A Buffalo firefighter suffered a minor ankle injury Tuesday night while fighting a blaze in a vacant house on the 100 block of Townsend Street, fire officials said,

The blaze started in the one-and-a-half story wood frame structure at about 11:30 p.m. Tuesday. Damage to the house was set at $40,000.

An emergency demolition was scheduled for later today, fire officials said.

Cause of the fire has not been determined.