Terrifying moments for diners when an explosion rocks an Olive Garden in Maryland.

It happened around 1 p.m. Wednesday at the restaurant on Baltimore Avenue in Laurel. Officials say the blast blew out the back wall of the restaurant.

70 customers and 15 employees were inside at the time. Two employees were hurt and treated for minor injuries.

Fire officials are investigating what caused the explosion. They believe it started in the restaurant's electrical utility room.