The investigation into the fiery crash of a medical flight in Northeast Philadelphia will continue Saturday with the Federal Aviation Administration and National Transportation Safety Board expected on the scene to search for answers to why the Learjet fell from the sky Friday night.

Six Mexican nationals were on board the Jet Rescue flight when it left Northeast Philadelphia Airport and within minutes crashed near Roosevelt Mall at Cottman Avenue and Roosevelt Boulevard, an always busy hub of activity with dozens of businesses and hundreds of homes.

The pilots and passengers on board are presumed dead, but officials on Friday night did not immediately confirm the number of fatalities. People on the ground were also injured and homes and cars were set ablaze when the Learjet 55 crashed in a massive, fiery explosion sending parts of the plane and other debris far and wide.

The medical flight would have no survivors, according to the Aviation Safety Network. Six were on board, the pilots, a medical crew and a little girl, who had been treated at Shriners Children’s Philadelphia and was given a sendoff earlier Friday for her return trip to Mexico, the hospital said. Her mother was also on the plane.

“We know there will be loss in this region,” Pennsylvanian Gov. Josh Shapiro said Friday night at a news conference with Philadelphia Mayor Cherelle Parker.

Pieces of the plane were still on the ground Saturday morning as the sun came up and the city got its first daytime look at the devastation in the area, including on Rupert Street, Calvert Street, the boulevard and Cottman Avenue. At least six burned out cars remained Saturday morning among the debris in a cordoned off area on Cottman near Rupert Street, close to spot of impact.

Authorities are expected to give their first update of the day at 9 a.m.

The crash in Philadelphia comes in the wake of the midair collision in outside of Washington D.C. that killed 67 people. The collision of an Army helicopter and American Airlines plane in the nation’s capital was the deadliest U.S. passenger air crash in over two decades, USA Today reported. Investigation of that crash is continuing.

Who was on Jet Rescue flight that crashed in Philadelphia?

Jet Rescue spokesman Shai Gold confirmed late Friday that all six people aboard the jet were Mexican nationals including a child patient, the child’s mother, a flight doctor and paramedic, pilot and co-pilot.

The company was contracted to transport the child from Philadelphia to Tijuana, Mexico, Gold said, but he could not provide any personal information about the child including an age or how long she was in Philadelphia receiving treatment.

Gold confirmed that a third-party charitable organization paid for the flight, but he didn’t provide the name of the organization. “Our heart goes out to the families,” Gold said. “It’s really an irreplaceable loss.”  

Shriners Children’s said the child was given a special sendoff celebration hours before the crash.

“Shriners Children is heartbroken to confirm that one of our pediatric patients and the child’s mother were aboard the Jet Rescue Air Ambulance that crashed in Philadelphia this evening. The patient had received care from Shriners Children’s Philadelphia and was being transported back to her home country in Mexico on a contracted air ambulance when the crash happened. Because of patient privacy concerns, we cannot say any more about the patient and her family at this time,” the statement read.

“Our hearts and prayers go out to the families of the medical crew and pilots who were also lost in this tragic event — as well as all of the people who were affected on the ground — and we’re thankful to the first responders for their quick action.”

Check back for the latest updates throughout the day.