A passenger about a cruise ship allegedly jumped overboard this weekend and crews are still searching for him.

26-Year-old Tien Phuoc Nguyen is a Canadian citizen who was on a seven-night cruise with his family aboard the Royal Caribbean's "Adventure of the Seas" when witnesses say he jumped off the ship after 8:46pm on Saturday, December 28, 2013.  The ship was about fifteen miles from Mona Island, Puerto Rico when he was reported overboard.

The United States Coast Guard immediately began search and rescue efforts.   The Federal Bureau of Investigation is trying to confirm whether Nguyen did indeed jump and determine what may have caused him to do so.