WASHINGTON (AP) — The Boston police commissioner says three city police officers were working with the U.S. terrorism task force but didn’t know about vague warnings by Russia’s government about one of the bombing suspects delivered nearly two years before the attacks.

Commissioner Edward Davis says he would have liked to known that Russian authorities had warned the FBI that Tamerlan Tsarnaev (TAM’-ehr-lun tsahr-NEYE’-ehv) was a radical extremist before the April 15 attacks.