Boston firefighters stop Level 3 hazmat leak at Deer Island

BOSTON (WHDH) -

Boston firefighters contained a Level 3 hazmat situation at Deer Island Saturday after a gallon of hydrogen peroxide leaked in a building, officials said.

Firefighters responded to Deer Island at 7:20 p.m. for reports of one gallon of hydrogen peroxide leaking, officials said. The leak was classified as Level 3, which is the most dangerous hazmat situation.

Firefighters in hazmat suits shut down the leaking valve, vented the building and monitored the air quality, according to fire officials.

There were no reported injuries.