No one was injured in a Monday night structure fire in Billings but the blaze caused significant damage.

Billings firefighters were called to 1375 Fourth Ave. N. at 9 p.m. The building was not occupied at the time.

The fire caused heavy damage to the building and contents, according to Deputy Fire Marshal Jeff McCullough. Damage to the property and loss of contents is estimated at $100,000,

The cause of the fire remains under investigation.