LONDON, Ohio (AP) -- Ohio law enforcement officers are honoring the memories of six colleagues killed in the line of duty.

Thursday's gathering at a training academy in London, west of Columbus, marks the 25th annual Ohio Peace Officers' Memorial Ceremony. The attorney general's office says the event honors six Ohio officers who died in 2011.

Officials also are adding six historical inductees to a memorial wall for fallen officers.

The state says 749 Ohio officers have been killed in the line of duty since 1823.