Army armored vehicles patrol along with nearly the entire Maine police force around the city of Lewistonwhere last night a 40-year-old US Army Reservist, killed at least 22 people in cold blood, in three different parts of the city.

The offender, Robert Card, is still on the run and a massive manhunt has been launched to locate him while schools remain closed and residents have been instructed to stay off the streets.

The same “considered armed and dangerous”according to a police Facebook post, and remains at large.

According to new police information released by the US media, the 40-year-old killer – who was also a certified firearms instructor had psychological problems.

He had stated that “he heard voices” while he had been hospitalized a few months ago in psychiatric clinic for two weeks.

Officials also said that Card had recently threatened to attack a National Guard base in Saco, Maine.