VICTORIA, Texas — A fire early Saturday morning destroyed a mosque in Texas that was burglarized a week ago and vandalized several years ago, officials said.

A convenience store clerk spotted smoke and flames billowing from the Islamic Center of Victoria around 2 a.m. and called the fire department.

“It’s sad to stand there and watch it collapse,” Shahid Hashmi, the Islamic center’s president, said. “The fire was so huge.”

Investigators said the fire’s cause had not been determined. Tom Legler, the Victoria fire marshal, said he had asked for help from the Texas Fire Marshal’s Office and the federal Bureau of Alcohol, Tobacco, Firearms and Explosives.