A 13-year-old boy was shot and killed by a police officer in Utica, N.Y., after a foot chase on Friday night, according to the police.

The boy was one of two juveniles stopped by the Utica Police Department’s Crime Prevention Unit at about 10:18 p.m., the police said. After they were stopped, the 13-year-old ran and displayed “what appeared to be a handgun,” the police said in a statement.

After a struggle on the ground, a police officer “ultimately discharged his firearm once, striking the male,” Mark Williams, the chief of police, said at a news conference on Saturday.

Lay Htoo, a close relative of the boy, identified him as Nyah Mway.

Nyah was taken to a hospital, where he died, the police said. Later, officers recovered a replica of a Glock 17 Gen5 handgun with a detachable magazine, according to the news release.

The replica was determined to be a pellet gun, according to Chief Williams.

The boys were stopped because of an “ongoing police investigation,” he said, but did not explain further.

“What happened yesterday evening in our community is an event that has become all too familiar and routine, over and over and over again,” Mayor Michael P. Galime of Utica said.