Firefighters battle 3-alarm blaze in Charlestown

“I’m staying with a friend down the street,” Reed said. “Thank God, Charlestown is a village.”

There was extensive damage to parts of both buildings, fire officials said.

“I looked out the window and I saw huge flames. I had to go outside and see what was going on,” said John Velho, 34, who lives on nearby Main Street.

No one was injured, said Boston Deputy Fire Chief Joseph Finn.

The cause of the fire is under investigation.

John M. Guilfoil can be reached at jguilfoil@globe.com