LAWRENCEVILLE — Fire crews are investigating a report of an explosion at a college in suburban Atlanta, where a woman was seriously injured.

Gwinnett County Fire Deputy Chief Charles Wells said it happened Monday morning in a women's restroom at Georgia Gwinnett College in Lawrenceville.

Wells said in an email a woman who works for the school's food service contractor suffered burns and "potential blast injuries." Wells said she is expected to survive.

Wells said all students are safe.

Georgia Gwinnett College said on its website that Building A will be closed for the rest of the day but classes elsewhere on campus would continue.

Authorities haven't determined the cause. Photos from local TV stations showed fire trucks, police cars and a bomb squad vehicle at the campus northeast of Atlanta.