At least 39 homes and buildings in towns outside of Boston, Massachusetts were hit in a series of suspected gas explosions, officials say.
Local police reported dozens of "fires and explosions" in the towns of Lawrence, Andover and North Andover, saying the "number will grow".
The explosions have resulted in evacuations and several serious and minor injuries, local media say.
Local gas and electric companies are cutting service to the area.
Merrimack Valley officials believe the explosions could have been set off by pressure issues with Columbia Gas lines, but have not confirmed a cause.