Massive manhunt for gunman after 18 killed in the US

Police named the suspect as Robert Card, who is a certified firearms instructor and a member of the US Army Reserve, as per the law enforcement

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The rampage in the small northeastern town of Lewiston also left 13 people wounded, three of them in critical condition, with a wide area under lockdown as schools were closed, roadblocks erected and residents ordered to stay indoors.

Governor Janet Mills said the suspect was "considered armed and dangerous, and police advise that Maine people should not approach him under any circumstances."

"This attack strikes at the very heart of who we are and the values we hold dear," Mills told reporters. "This is a dark day for Maine."