Seven people were killed at the Sparetime Recreation bowling alley: one female and six males, authorities said.

Eight people were shot and killed at Schemengees Bar & Grille: seven males inside and one male outside, police said.

Three people died at the hospital, police said.

Eight of the deceased victims have been identified and those families have been notified, police said.

The suspect, Robert Card, remains at large and is considered armed and dangerous, authorities said.

A warrant for eight counts of murder has been issued for his arrest. Police said the warrant will be updated when the remaining 10 victims are identified.

Officials said they're looking into the suspect's mental health history.

"No words can truly or fully measure the grief," Maine Gov. Janet Mills said at a news conference Thursday.

"Our small state of just 1.3 million people has long been known as one of the safest states in the nation," she said. "This attack strikes at the very heart of who we are and the values we hold dear for this precious place we call home. All Maine people are sharing in the sorrow of the families who lost loved ones last night."

Maine had just 29 homicides all of last year, according to The Associated Press.

There have been at least 565 mass shootings in the U.S. so far this year, according to the Gun Violence Archive. Mass shootings are defined as an incident in which four or more victims are shot or killed, according to the archive.

Wednesday night's mass shooting in Lewiston, Maine, which claimed at least 18 lives, is the deadliest shooting of the year and one of the deadliest in recent decades.

President Joe Biden in grieving the loss of life in Maine and is praying for the injured, White House national security spokesperson John Kirby told MSNBC.

Kirby urged Congress to do more to ban semi-automatic rifles, which he called weapons of war allowed on the streets, and said that Biden's recent legislation, the Safer Communities Act, was a start -- but not enough.

The Safer Communities Act included incentives for states to pass red flag laws, closed the so-called boyfriend loophole and created an enhanced background check process for people under 21 who are looking to buy firearms from licensed dealers. Biden himself, while signing the bill, said it wasn't everything he wanted but was a start.

Biden has ordered flags to be flown at half-staff in honor of the Maine victims.

Attorney General Merrick Garland said in a statement, "I am heartbroken for those who have lost loved ones, for those who have been injured, and for the entire Lewiston community."

"The FBI, ATF, and U.S. Marshals are on the ground to provide investigative support and victims assistance services to our law enforcement partners in Maine," he said. "No community should have to endure the horrific mass shootings that have become routine in our country."

U.S. Rep. Jared Golden, (D-ME), announced that he was changing his policy against an assault rifle ban during a news conference with other Maine congressional leaders Thursday evening.

Golden was one of five Democratic House members who voted against a ban in 2022. Although the bill passed 217 -213, it did not move forward in the Senate.

Golden said the shooting has made him change his stance and will now support any measures in Congress that ban assault weapons.

"I ask for forgiveness and support as I seek to put this end to these terrible shootings," he said.

Sen. Susan Collins, (R-ME), told reporters that although she wanted to see more gun control reforms, such as a ban on high-volume magazines, she did not support an assault rifle ban.

Although Collins said she didn't know the circumstances as to how the suspect, who has had reported mental health issues, was able to commit the shooting, she said more should have been done.

She cited the state's "yellow flag" law, which gives law enforcement the authority to request a court to remove firearms from someone who has mental health problems.

"It certainly seems that on the basis of the facts that we have, the yellow flag law should have been triggered," she said.