A plane carrying a pilot and 11 skydivers crashed shortly after takeoff from a Missouri airfield on Sunday, killing all aboard, officials confirmed. The aircraft went down in a field about an hour south of Kansas City and engulfed in flames upon impact, authorities said.

Federal investigators arrived at the scene on Monday to begin determining the cause of the accident. At this time, the identities of the victims have not been officially released, though friends and colleagues have begun paying tribute to those lost.

Among the deceased were several experienced skydivers, including Jen Sharp, technology director of the United States Parachute Association (USPA), the sport’s national governing body. The USPA described Sharp as a passionate and dedicated leader within the skydiving community.

“Jen was a remarkable force whose passion for the skies was matched only by her dedication to the people in our sport,” said Albert Berchtold, the USPA’s executive director.

Authorities continue their investigation, with the National Transportation Safety Board expected to provide updates as the inquiry progresses. No further details about the circumstances of the crash have been released at this time.