(NewsNation) — Investigators have recovered the cockpit voice recorder (CVR) of the medical transport jet that crashed on Jan. 31 in Philadelphia, the National Transportation Safety Board (NTSB) announced Sunday.

The CVR was located at the site of initial impact, at a depth of 8 feet, according to the NTSB.

Investigators also recovered the airplane’s enhanced ground proximity warning system (EGPWS), which could also contain flight data. Both components will be sent to the NTSB Vehicle Recorders Laboratory in Washington, DC for evaluation.

Wreckage recovery is expected to continue Monday and all of the wreckage will be sent to a secure location in Delaware for further examination.

A child and five others died Friday evening after a small medical plane crashed in a residential and shopping area in Philadelphia, causing an explosion and multiple house fires.

Three people on the ground remain in critical condition, Mayor Cherelle Parker confirmed Sunday. Another person in a vehicle was also killed.

Victims of the Philadelphia jet crash

In addition to the six fatalities, 22 people were injured, another five are hospitalized and three are in critical condition.

According to multiple media reports, a Jet Rescue Air Ambulance spokesperson on Saturday identified the victims as: Capt. Alan Alejandro Montoya Perales, co-pilot Josue de Jesus Juarez, paramedic Rodrigo Lopez Padilla, Dr. Raul Meza Arredondo, patient Valentina Guzman Murillo and Lizeth Murillo Ozuna, the patient’s mother.

Philadelphia officials and plane owner Jet Rescue Air Ambulance have not yet confirmed the identities of the dead as of Sunday night, but XE Médica Ambulancias, a Mexican emergency service, identified one of the victims as Dr. Raúl Meza of the State of Mexico near Mexico City, its chief of neonatology. Relatives of Josué Juárez of Veracruz said he was the aircraft’s co-pilot.

Philadelphia Mayor Cherelle Parker on Sunday said names of all of the deceased victims from Mexico will not be made public until Mexican consulate officials deem it appropriate.

Parker also confirmed Sunday that in addition to the six people killed in the crash, one other person in a car has died.

Mexican President Claudia Sheinbaum expressed condolences Saturday morning in a statement on the social media platform X.

“I mourn the passing of six Mexicans in the aviation accident in Philadelphia, United States. Consular authorities are in constant contact with the families; I’ve asked the Foreign Affairs Secretary to support whatever is needed. My solidarity with their loved ones and friends,” she said in a statement written in Spanish.

Jet was transporting child home from hospital

The medical transport jet was transporting a child who had just completed treatment for a life-threatening condition at Shriners Children’s Hospital, her mother and four others. It crashed into a Philadelphia neighborhood shortly after takeoff Friday evening, exploding in a fireball that engulfed several homes.

Jet Rescue issued a statement confirming the crash of a medical plane carrying four crew, a pediatric patient and an escort. The company did not confirm any survivors and said no names are being released until the families have been notified.

The FAA said in a statement that “a Learjet 55 crashed around 6:30 p.m. local time on Friday, Jan. 31, after departing from Northeast Philadelphia Airport. … The plane was en route to Springfield-Branson National Airport in Missouri.”

Flight data showed a small jet taking off from the airport at 6:06 p.m. and disappearing from radar about 30 seconds later after climbing to an altitude of 1,650 feet.

NTSB officials who are investigating the crash said at a Saturday press conference that the flight lasted less than a minute. 

The flight’s final destination was Tijuana after a stop in Missouri.

The agency is classifying the crash as an accident.

It is not clear what caused the crash.

NTSB working to clear debris

National Transportation Safety Board chair Jennifer Homendy said her agency’s staff are working to collect debris from the plane, which could take days or weeks.

Multiple blocks from around the crash area were still closed down on Saturday afternoon.

“We’re just asking for prayers for any and everyone who may have been affected,” Mayor Parker said in a brief news conference shortly after the crash.

Parker asked residents to stay away from the site due it being an active investigation area. She said shelters were up and running for anyone impacted by the crash.

Pennsylvania Gov. Josh Shapiro said he is offering resources including state troopers, emergency management personnel and members of the state’s transportation department to aid local responders.

“We know that there will be loss in this region, and we want to offer our thoughts and our serious prayers for those who are grieving at this moment,” he said in a news conference Friday night.

Shapiro also commended the Philadelphia community for their “unified” response in supporting one another.

‘The neighbors are just in disbelief’

Philadelphia Councilman Anthony Phillips told NewsNation the aircraft landed in a highly congested and dense area.

“The neighbors are just in disbelief. There’s neighbors that just said to me, ‘You know, I just, I thought it was a bomb,’” he said. “You can imagine the fear that people have right now here in northeast Philadelphia.”

He said residents who were shopping at a nearby mall said it “felt like an earthquake.”

President Donald Trump issued a statement on his Truth Social platform saying, “So sad to see the plane go down in Philadelphia, Pennsylvania. More innocent souls lost. Our people are totally engaged. First Responders are already being given credit for doing a great job. More to follow. God Bless you all.”

Vice President JD Vance called the crash a “Very sad situation. May God bless the victims and their families,” in a post on X along with a screenshot of Trump’s message.

Pennsylvania Sen. John Fetterman posted that he is in contact with Philadelphia’s mayor and is also waiting for updates.

Sen. Dave McCormick said on X that he and his team “are closely monitoring the tragic situation unfolding in Northeast Philadelphia” and “are lending our full support.”

The Associated Press contributed to this story.