A 46-year-old stand-up paddleboarder has died after he fell off his board and became distressed in waters at Keehi Lagoon Sunday.

Honolulu fire rescue crews responded to a call of a paddleboarder in distress at the lagoon near the Daniel K. Inouye International Airport just after 2:10 p.m.

Nearby airfoil surfers called 911 after the paddleboarder fell off his board and yelled for help.

Airfoil surfers then headed toward the man. Once they reached him, he was unresponsive.

The fire department said airfoil surfers placed him on the paddleboard and began cardiopulmonary resuscitation until fire rescue crews arrived.

Firefighters and Ocean Safety brought him to shore via rescue board and personal watercraft where crews administered CPR until Emergency Medical Services personnel arrived and took over.

He was taken to a nearby hospital where he was pronounced dead.

Police said there are no signs of suspicious circumstances.