Seven people were injured Sunday in an explosion at a Virginia Beach shooting range, and four of them remain hospitalized with burns from the resulting flash fire inside the range.

Battalion chief Leon Dextradeur said the explosion happened at 1:30 p.m. Sunday at A&P Arms, a shooting range on Lishelle Place in the Lynnhaven section of the city. The explosion, which occurred in the section of the building where customers shoot at targets, set off a flash fire that burned seven of the 15 people who were in the range at the time. Two of the victims were listed as critical when they arrived at the hospital.

Dextradeur said four of the seven victims remain at Sentara Norfolk General Hospital. He described them as "all conscious and talking, with different levels of burns."

Dextradeur said the explosion remains under investigation by the fire department and the Federal Bureau of Alcohol, Tobacco and Firearms. He said there was no immediate sign of foul play.