Warning signs have returned to a Kailua beach this afternoon after officials spotted two sharks.

Ocean Safety lifeguards will be patrolling the water and advising beach-goers of the danger, according to a spokeswoman for the city Emergency Services Department.

The signs initially were posted Sunday morning at Kalama Beach Park, which is adjacent to Kailua Beach Park, warning about the potential hazard of sharks after a whale carcass and a live whale were seen about 100 yards offshore.

The signs were removed earlier today, but were put back up after NOAA personnel saw the sharks, the spokeswoman said. The signs will remain up for the rest of the day, she said.