An HPD helicopter spotted what appeared to be a 12- to 15-foot tiger shark off Chun's Reef on the North Shore early yesterday afternoon.

Shark-sighting signs were posted at Chun's Reef and the Laniakea areas. A re-assessment will be done this morning to determine if the signs will need to be posted again.

No injuries were reported, and the shark did not appear to be exhibiting any aggressive behavior.