Firefighters were battling the third major apartment fire in Lewiston in a week this morning.

Authorities say more than 100 firefighters responded to the scene of a blaze on Bartlett Street reported at about 3 a.m. today.

Chief Paul LeClair said four buildings were involved this morning, including two that are vacant.

It appears all residents made it out of the other buildings safely. There were no reports of injuries.

More than 180 people have been left homeless by two fires in the past week: one last Monday and one on Friday. All three were in the same general area. There was no word on the cause of the latest fire.

Two 12-year-old boys are facing arson charges in connection with the two prior blazes set just blocks apart last week.

One boy was arrested on four counts of arson for the fire late May 3 that destroyed three apartment buildings and left 105 people homeless. About 20 families, many of them Somali immigrants, were displaced by that fire, and many spent the night at Lewiston High School. One minor injury was reported.

A different 12-year-old boy was charged Thursday with setting a fire April 29 that destroyed four apartment buildings and left 75 people homeless. That suspect is to be arraigned today.

Investigators determined the May 3 fire started in a vacant garage next to a condemned apartment and quickly spread, Maine Department of Public Safety spokesman Steve McCausland said in a news release. Damage from the blaze was estimated at $1 million.

Police said witnesses reported seeing a young man fleeing from the scene around that time. The fire sent forth thick plumes of black smoke that could be seen from miles away. The night sky lit up with orange and red from the flames.

Adriana Garcia, the manager of a building where one of the fires broke out, said one of the displaced residents is a brother of Gov. Paul LePage. City fire officials didn’t immediately return a call from The Associated Press seeking comment, and the governor’s spokeswoman, Adrienne Bennett, said she was checking into the report.

LePage grew up in poverty in Lewiston and has more than a dozen siblings.

The boy was arrested Saturday and was being held at the Long Creek Correction facility for juveniles, pending a court appearance today or Tuesday, McCausland said. Officials said others may be charged.