ANCHORAGE, Alaska -- Military officials are considering canceling a popular air show after four people were killed when a military cargo plane crashed at an Anchorage base during a training demonstration for the event.

The Wednesday evening crash occurred at Elmendorf Air Force Base Wednesday evening, three days before the Arctic Thunder air show, set to run Saturday through Sunday.

The names of the four men on board the C-17 have not been released pending notification of relatives. Three of those killed were in the Alaska Air National Guard, and the fourth man was on active duty at Elmendorf

Officials say the plane went down about a minute after it took off from a runway.

The C-17 was part of the 3rd Wing, based at Elmendorf.