Boston police have evacuated a neighborhood and closed streets near Fenway Park to investigate chemicals stored in the basement of a commercial building.

Police Commissioner William Evans said Tuesday night that police found a large amount of contained chemicals and acids along with heating equipment that may be some type of lab. The FBI joint terrorism task force is assisting, in an abundance of caution.

Officials said there's no threat to the ballpark, where the Red Sox and Toronto Blue Jays are playing. Evans said officers are prepared to direct fans from the scene after the game.

Some nearby residential buildings are evacuated. A senior housing unit is sheltering in place.

Technicians are testing the materials, found by city inspectors in the basement of one business at 76 Kilmarnock St.