OTTAWA, Ontario (AP) — Canadian police now concede there was only a single gunman in a terror attack that killed a soldier standing guard at Ottawa's war memorial and then stormed Parliament in a hail of gunfire.

Ottawa police Constable Marc Soucy confirmed to The Associated Press Thursday that police are satisfied there was one attacker. Ottawa police Chief Charles Bordeleau told the Canadian Broadcasting Corp. that "there is no longer a threat to public safety."

Police said in the initial hours after the shootings that as many as two other gunmen may have taken part. But as the day wore on, it appeared increasingly likely that the attack was the work of one person.