Nearby states on alert after shootingpublished at 14:43 British Summer Time 26 October 2023
Authorities in north-eastern states close to Maine are on alert as the hunt for the gunman continues.
New Hampshire's homeland security agency says it is monitoring the situation and has asked people in the state to be vigilant. The New Hampshire-Maine state border is around 50 miles (80.4km) from Lewiston.
A statement also said the agency has contacted "our counterparts in Maine to offer and provide any medical and safety resources needed as they manage this horrific situation".
Further afield, Colonel Stavros Mellekas, deputy commissioner of Connecticut's State Police, called the incident "deeply disturbing and heart-breaking".
A statement said that, despite "no specific threats", the situation is being monitored, adding: "At this time, our focus will be on protecting communities within our state."