UPDATE, 6:50 p.m. Heavy fire still burning on top floor and roof in the mainly wooden building.
A fire reported around 2:30 p.m. in the Treadmark condo and apartment building that had been nearing completion at 1971-1977 Dorchester Ave., went to six alarms, the Boston Fire Department reports.
The department reports no injuries.
The department reports the fire-alarm system for the building had been set for tomorrow - and that residents were scheduled to move in July 15. Now, the department says, inspectors may not be able to get in until Friday afternoon to try to determine the fire's cause.
The building, rising on the site of the old Ashmont Tire, was being built with 52 affordable apartments and 32 condos.
Paul Nutting watched the firefighters at work: