Lifeguards in Oceanside are investigating after a shark reportedly attacked a woman's outrigger canoe off the coast Monday. According to lifeguards, the attack happened roughly two miles off the coast of Oceanside Harbor at an unknown time Monday. Lifeguards said the woman was canoeing when the shark came from beneath the vessel and bit the canoe. The woman was reportedly unable to see the creature due to the nature of the attack. Photos of the canoe have been sent to a shark expert to determine what kind of shark is responsible for the bite. The woman inside the canoe at the time of the incident was uninjured.