Two sharks were spotted in the area of Bellows in Waimanalo Friday afternoon about 30 to 50 yards offshore, Ocean Safety officials said.
The sharks were approximately 8 to 10 feet long and aggresively thrashing in the water, according to officials.
Ocean Safety received the call around 2:15 p.m. and lifeguards cleared the water.
Shark Warning signs have been posted and will remain up for the rest of the day.
Officials will reassess the area in the morning around 9 a.m.