At least 22 people were killed in multiple shootings in Lewiston, Maine, on Wednesday night, CNN reported, citing multiple law enforcement sources.

50 to 60 people are injured in the incidents, though it remains unclear how many are injured due to gunfire, the sources told CNN.

A suspect remains at large, the Androscoggin County Sheriff’s Office said in a post on Facebook, but police have identified Robert Card as a person of interest in the shootings.

“We are encouraging all businesses to lock down and or close while we investigate,” the sheriff’s office said earlier.

Maine State Police also said they are responding to an active shooter situation in Lewiston in a post on Facebook.

“Please stay inside your home with the doors locked,” state police said. “If you see any suspicious activity or individuals please call 911.”

According to reports, law enforcement responded to Sparetime Recreation, a bowling alley on Mollison Way and Schemengees Bar & Grille Restaurant on Lincoln Street.

Lewiston public information officer Derrick St. Laurent told the Sun Journal newspaper that another shooting was reported at the Walmart Distribution Center on Alfred A. Plourde Parkway in Lewiston.

Lewiston is about 36 miles north of Portland and is the state’s second-largest city.