Update, Feb. 1, 2012: The Somerville Fire Department, in an update sent via email, said the fire is not suspicious, and it is being investigated by the Fire Investigation Unit.
Four adults and two children were displaced by the fire, according to the update. In addition, three cats escaped the fire; at least one was discovered when firefighters searched the building.
The fire damaged a second-floor apartment and spread to the roof, the announcemnt says. Smoke and water damaged another second-floor apartment and the first-floor apartment.
A fire at a residential building shut down traffic on Somerville Avenue in Union Square Monday morning.
According to Deputy Chief Jim Lucia, of the Somerville Fire Department, no one was injured in the fire, but the residents of the building, some five or six people, are now displaced.
The fire started in the second-floor kitchen at 347 Somerville Ave. shortly before 8 a.m., Lucia said. The resident or residents of the second floor had already left for work when it started, but the family of four on the first floor was still at home, he said.
There was "heavy smoke throughout the building," Lucia said of the fire.
As of 9 a.m., Somerville Avenue between Bow Street Hawkins Street was still shut down to traffic.