The state Department of Land and Natural Resources posted warning signs off Lanikai Beach after a man reported seeing a shark about 8 to 10 feet long this morning.

The beach remained open, but the fire department  helicopter and lifeguards on personal watercraft searched the area between Kaneohe Bay and Bellows Beach.

No sharks were seen, said Honolulu Fire Department spokesman Capt. Earl Kealoha.
A man on a Boston Whaler reported seeing the shark at about 8 a.m. near the Mokulua Islands, he said.