Published: Sep 05, 2010 8:38 PM EDT
Updated: Sep 05, 2010 5:39 PM EDT

SANIBEL, Fla. -  The Medical Examiner is investigating how a man in his 60's drowned off Sanibel Island on Sunday afternoon.

Witnesses say he was floating in the water for awhile before anyone realized he was in trouble.

Firefighters administered CPR but the man did not survive. No one knows how long he was out in the water or if the current played a part in his death.

"We came by boat. The current was ripping through here, we had a hard time getting out here, it was over our head," said beachgoer Stephanie Cross.