A fire in a duplex unit undergoing renovations at 2-4 White St. Place in East Boston displaced the four people living in the building's other unit early this morning, the Boston Fire Department reports.

Firefighters responded at 4:03 a.m. to what became a two-alarm fire in the 2 White St. unit. Damage was estimated at $100,000 and the cause is under investigation, the department says.