The National Transportation Safety Board says both of the aircraft which collided over the Talkeetna Airport last weekend, injuring two people, were transmitting position updates until the crash.

A preliminary NTSB report (PDF) on the midair crash, which took place at about 6 p.m. on May 31, said the student pilot and sole occupant of a Cessna 172 -- identified by Alaska State Troopers as 27-year-old Cole Hagge of Eagle River -- was seriously injured in the collision. One of the four passengers on board a Talkeetna Air Taxi Cessna 185, flown by 32-year-old Anchorage man Antonio Benavides, reported minor injuries after the crash.

According to the NTSB, Hagge didn’t have a flight plan but left the Palmer Airport for Talkeetna at about 4:25 p.m. Benavides took off from the Talkeetna Airport just before 5 p.m., on a flight plan for a flightseeing trip over Denali National Park. Troopers said last week that the planes had collided at an altitude of roughly 100 feet over the runway.

“After the collision, both airplanes remained joined together during and after impact with the ground,” NTSB officials wrote. “The debris field was about 460 feet long with the initial fragments located about 62 feet prior to the runway threshold. The main wreckage came to rest about five feet off of the left side of the runway.”

Weather conditions reported by the Talkeetna Airport just before 5 p.m. that evening included clear skies with 10 miles of visibility, and winds from the north at 4 knots. Radio traffic included calls from Benavides and Hagge.

“During a preliminary review of FAA Flight Service Station recordings of the common traffic advisory frequency (CTAF), 123.6, both airplanes can be heard transmitting position reports in relation to the airport traffic pattern,” NTSB officials wrote.

Clint Johnson, the NTSB’s chief Alaska investigator, said Sunday that little additional information is available on the collision, pending further investigation.

“They’ve got a couple of folks who actually saw it that they’re trying to track down, but that about sums it up,” Johnson said.

Investigators have yet to examine the wreckage from the crash in greater detail.

Editor's note: An initial version of this story which listed Benavides and Hagge as flying the wrong aircraft has been corrected.