WASHINGTON (AP) — Nuclear power plants in Massachusetts and New Hampshire have increased security after two bombs exploded in Boston on Monday, killing at least two people and injuring dozens. The Pilgrim Nuclear Power Station in Plymouth, Mass., and the Seabrook Station in Seabrook, N.H., heightened checks of vehicles, materials and individuals entering the plants.

Pilgrim, about 45 miles south of Boston, was already shut down for refueling when the explosions occurred. Seabrook is about 45 miles north of Boston in Seabrook, N.H.