At least two people have been killed, and five others were reportedly injured, after the small plane they were in, crashed into Lake Powell Park Saturday.

The Federal Aviation Administration reports that the incident happened at about 5:30 p.m. on Aug. 13 when a single-engine Cessna 207 crashed in Lake Powell National Park northeast of Page, Arizona after the pilot reported an engine issue. Seven people were on board at the time of the crash.

The NTSB says a Cessna T207A Turbo Stationair 8 sightseeing plane went down into the lake on the Utah side and sank. Details as to where the flight originated from have not yet been released.

The FAA and National Transportation Safety Board are investigating the cause of the crash.