Yes,orcas have attacked humans.There have been many reported attacks against human.One of these attacks was reported on February 10, 2014, a free diver in Horahora Estuary close to Whangarei, New Zealand, was pulled down for more than 40 seconds by an orca.He got a sack containing crawfish and imps, which was tied to his arm by a rope. The rope in the long run came free. He then fixed his weight belt and got back to the surface. He had lost all sensation in his arm and couldn't swim, yet his cousin was close to the incident and assisted him to reach certain stones where the sensation in his arm returned.
