Fire extensively damaged a vacant house on Aberdeen's east side late Friday night, investigators said.

The cause of the fire in the two-story, single family house in the first block of East Bel Air Avenue remains under investigation, according to the Maryland State Fire Marshal's Office.

The fire was reported by a passerby about 11:58 p.m. Sixty firefighters and equipment from the Aberdeen Fire Department, Aberdeen Proving Ground Fire Department and the Susquehanna Hose Company of Havre de Grace brought the fire under control in about 90 minutes, according to a notice of investigation from the Fire Marshal's Office.

The fire originated in the dwelling's interior. Damage is estimated at $45,000 to the structure and $5,000 to contents, the Fire Marshal's Office said.

The property, whose owners are listed as Krista Wright and the late Stephen Wright, has been vacant for more than 10 years, the Fire Marshal's Office said.

Anyone with information about the fire is asked to contact the Northeast Region Office of the State Fire Marshal in Bel Air, 410-836-4844