Updated

The National Transportation Safety Board says security camera footage captured the "rapid descent" of a small plane just before it crashed at a southern Utah airport last month, killing all four young men aboard.

The NTSB says in its preliminary report that the video shows the plane making a "rapid ascent" as it took off from the St. George airport on May 26. After disappearing from the camera's view, the single-engine Cessna 172S reappears farther away about seven seconds later in a "rapid descent."

The report says the plane crashed about 525 feet from the edge of the runway. Its reported destination was Mesquite.

The victims were Colby Hafen and Christopher Chapman, both of Santa Clara; Tanner Holt of Washington City; and Alexander Metzger of St. George.