The National Transportation Safety Board ended its press briefing offering limited details about the fiery crash that killed all nine on board a private jet in Palm Beach County on Sunday.

The NTSB did not reveal the identities of the victims. Local authorities are expected to give the names of the deceased after DNA has been collected from the site

We learned earlier today from the BBC's media partner CBS News that one of the victims was 20-year-old Nathalia Filgueiras, the plane's co-pilot.

The NTSB - citing recordings from the cockpit voice recorder - described a scenario where things escalated quickly for the aircraft's crew, after they requested to increase altitude while reporting they were taking on additional precipitation.

Less than 30 seconds after the crew made the request to air traffic control, the NTSB said, the aircraft crew issued a "mayday call". Then the transmissions grew unintelligible.

Officials said they were unlikely to have a probable cause for the crash anytime soon, anticipating a "lengthy investigatory process" combined with additional delays and obstructions due to stormy weather.

We are ending our live coverage of the briefing. For more on the crash, you can read here.

The jet crashed close to a plot of land where about 77 mobile homes were parked, we learned from the briefing with local authorities, and residents in the area had to evacuate.

People living in the area have been unable to return home since the crash and are being housed in a nearby shelter, District Commissioner Joel Flores told reporters following the NTSB press conference.

There is currently no timeline for how long the site will be closed off. Local officials are looking into temporary housing solutions as well as car rentals so residents can get to work.

We learned today that the plane began descending less than 30 seconds after the crew notified air traffic control they wanted to climb to 37,000 feet. Here are the times we have for how the incident unfolded on Sunday:

• 10:37 EST (15:37 GMT) - The aircraft departed Austin Bergstrom International Airport en route to North Eleuthera, Bahamas
• 12:47 EST - The crew transmitted to air traffic control that they were encountering manageable levels of white, clear ice and turbulence. "Very soon after", the crew said they were picking up precipitation and requested to increase altitude. Issued a "mayday call" less than 30 seconds later
• 12:48 EST - The crew said the aircraft was "in an overspeed condition" as it was descending, before the transmission became unintelligeble

We just heard from representatives from the National Transportation Safety Board. Here's what they told us:

• Nine passengers were on board the plane which was travelling from Austin, Texas, to the Bahamas - two flight crew and seven passengers
• All on board were killed, and a man nearby sustained a leg injury from the crash

• Twenty investigators arrived on Sunday evening to probe what happened, NTSB member Tom Chapman said.
• Weather and turbulence played a factor and there is evidence that parts of the plane began to fall apart before hitting the ground, but the crash's cause has not been determined
• The crash site - a crater in a roadway - is currently filled with rain water and recovering evidence will be a "daunting challenge".

The press conference with federal authorities has now ended, but just after, local authorities in Palm Beach County, Florida, gave an update on their work.

The local medical examiner is working to identify the victims using DNA collected from the site.

"They're involved in collection and assessment right now. There's going to be some DNA that needs to be matched," an official said.

After the NTSB officials ended their briefing, a reporter off-camera shouted a question at NTSB officials asking about the identity of the victims.

Monville, the NTSB investigator, replies saying that information is not available.

We can hear him say those details will come from local authorities.

An individual near the crash site sustained a leg injury as a result of the crash, Monville tells reporters.

He was in a vehicle near the impacted area, the investigator says, adding that he will be interviewed today.

The debris is scattered among ball fields, business and personal residences in the area. But the debris is rather small.

Chapman is asked about recovering evidence from the crash site, which he described as a "real challenge".

"That's one of the things that's going to be daunting," he says.

Chapman is asked what role the copilot would have played in the crash, after she was identified as 20-year-old Nathalia Filgueiras.

"We don't yet know that," Chapman says."That is one of the things that we'll seek to determine."

For context: The identities of the nine victims have not been revealed, but US media has confirmed Filgueiras's death.

Filgueiras made headlines in 2023 when she received her pilot licence while still in high school - before she could legally drive.

There is evidence that there was some breakup of the aircraft before it made impact with the ground, Chapman says to a reporter's question.

He adds that there was a cockpit voice recorder, but it needs to be determined if it was still on board at the time of the crash and if it can be recovered.

Chapman now opens the floor to questions.

The first question is on whether they are investigating how ice and turbulence played a factor in the crash. "That's certainly a factor," Chapman responds.

As the investigation is still ongoing, he says, responding to the next question, investigators are still determining "who knew what and when"

Chapman says the NTSB will not be determining the probable cause of the crash anytime soon, as a "lengthy investigatory process" takes hold.

"Nor will we speculate about the cause," he says.

NTSB member Tom Chapman returns to speak, saying the NTSB will be interviewing witnesses and they encourage people to come forward.

He also says that if people find debris, "please do not move it".

"Contact us or local authorities, and we will respond appropriately," he says.

He adds that the NTSB will not be determining the probable cause of the crash, but that they are on scene. He says they will not speculate about the cause either.

"These are the first steps in a lengthy investigatory process," he says, adding, "Our mission is to understand not just what happened, but why it happened, and to recommend changes to prevent it from happening again".

Timothy Monille, a senior air safety investigator with the NTSB is now speaking. He is leading the investigation on the crash.

He arrived to the accident site at 19:00 EST last night to identify parts of the plane and document them, he says.

As part of the investigation, the NTSB is working with the Federal Aviation Administration, representatives from Learjet, the plane manufacturer, as well as weather experts and air traffic control experts.

"The biggest obstacle will be in recovering the major wreckage from the impacted crater on the roadway," Monville says.

Chapman says that of the nine passengers on board, two were flight crew and seven were passengers.

After departing Austin, Texas, en route to the Bahamas, the crew transmitted to air traffic control multiple times that they were encountering ice and moderate turbulence.

"We are picking up precipitation, requesting to climb to 37,000 feet if able," the crew said.

Chapman says that "less than 30 seconds later", the plane began to descend and the crew issued a "mayday call".

The transmission then became "unintelligible", he says, adding that: "Sadly, all aboard were lost."

National Transportation Safety Board (NTSB) member Tom Chapman has opened the media conference, saying they are investigating the crash, which occurred on Sunday at 12:51 pm EST in Palm Beach.

Twenty investigators arrived on Sunday evening to investigate the Learjet 60 plane crash.

Chapman also expresses "profound condolences".

The press briefing has begun.

We are hearing from Thomas Chapman, a member of the National Transportation Safety Board, which is investigating the incident. You can click the link above to watch live.