The Yarmouth Fire Department is battling a major fire at a long-vacant restaurant on Route 6A in Yarmouth Harbor, a dispatcher confirmed Sunday evening.

The dispatcher, who declined to give his name, said the cause of the fire was not yet known. He said police received a call reporting the fire just before 6:30 p.m. Almost three hours later, emergency services remained at the scene of the fire; further details were not immediately available.

Videos and photos posted on social media showed huge orange flames and plumes of smoke rising into the sky above the dilapidated wooden building as firefighters monitored and hosed down the structure’s remains.