Papenburg, GERMANY:  Residents watch as the cruise ship Norwegian Pearl sails through a narrow portion of the river Elms, before entering the North Sea late 04 November 2006. German authorities are still investigating whether the power surge caused when high voltage cables close to the river were turned back on after the ship had completed its passage, was partly responsible for the power cut experienced in most of western Europe late 04 November. AFP PHOTO DDP/NIGEL TREBLIN     GERMANY OUT  (Photo credit should read NIGEL TREBLIN/AFP/Getty Images)
STRINGER/DDP/AFP/Getty Images
Papenburg, GERMANY: Residents watch as the cruise ship Norwegian Pearl sails through a narrow portion of the river Elms, before entering the North Sea late 04 November 2006. German authorities are still investigating whether the power surge caused when high voltage cables close to the river were turned back on after the ship had completed its passage, was partly responsible for the power cut experienced in most of western Europe late 04 November. AFP PHOTO DDP/NIGEL TREBLIN GERMANY OUT (Photo credit should read NIGEL TREBLIN/AFP/Getty Images)
Now playing
00:52
Woman missing after fall from party cruise ship
Croatian Coast Guard rescues British woman.
Croatian Coast Guard
Croatian Coast Guard rescues British woman.
Now playing
00:59
Woman rescued after falling off cruise ship
A polar bear was shot and killed after attacking a cruise ship guard, according to the German cruise company Hapag-Lloyd Cruises.
Gustav Busch Arntsen/Governor of Svalbard
A polar bear was shot and killed after attacking a cruise ship guard, according to the German cruise company Hapag-Lloyd Cruises.
Now playing
02:01
Cruise guard kills polar bear, sparks outrage
WVUE, viewer video
Now playing
01:13
Carnival cruise ship floods in the Caribbean
SEVEN NETWORK
Now playing
01:35
Brawl erupts on cruise ship
"Art work was taped down and passengers were lying in the main lobby. Likely nervous to be in their cabins as waves were higher than the windows on the lower decks."
@ishanbyrde/Twitter
"Art work was taped down and passengers were lying in the main lobby. Likely nervous to be in their cabins as waves were higher than the windows on the lower decks."
Now playing
02:12
Norwegian Cruise passenger: It was a disaster
royal caribbean illness passengers return to florida orig_00000000.jpg
WSVN
royal caribbean illness passengers return to florida orig_00000000.jpg
Now playing
00:55
Hundreds ill during Royal Caribbean cruise
Now playing
01:29
Cruise ship horror stories
Greg Cribbs
Now playing
01:01
Rough seas ruin Royal Caribbean cruise
cruise ship rough seas passengers lipman newday_00005308.jpg
Facebook/Carolyn Pu
cruise ship rough seas passengers lipman newday_00005308.jpg
Now playing
01:26
Battered cruise ship returns home after large storm
carnival crewmember elevator accident death florida pkg_00005014.jpg
carnival crewmember elevator accident death florida pkg_00005014.jpg
Now playing
02:09
'Bloody mystery' on Carnival Cruise ship
pkg missing cruise ship crew body washed ashore_00002204.jpg
WFTS
pkg missing cruise ship crew body washed ashore_00002204.jpg
Now playing
01:09
Body washed ashore on Fla. beach ID'd
china shipwreck search and salvage watson pkg_00014523.jpg
cctv
china shipwreck search and salvage watson pkg_00014523.jpg
Now playing
02:20
Search for bodies inside capsized Chinese cruise ship
dnt watson stranded cruise ship australia_00002630.jpg
dnt watson stranded cruise ship australia_00002630.jpg
Now playing
01:40
Cruise ship docks after getting stranded in storm
dnt baltimore cruise ship norovirus_00001928.jpg
WJZ
dnt baltimore cruise ship norovirus_00001928.jpg
Now playing
01:20
Cruise cut short after passengers get sick

Story highlights

Search underway off Cuba for woman who fell off cruise ship

Cruise line says "guest was observed intentionally going overboard"

Incident happened during electronic dance music event

CNN —  

A search is underway in the waters off Cuba after a woman went overboard during a cruise ship dance party.

The U.S. Coast Guard says the unidentified woman was reported missing Thursday night by the crew of the Norwegian Pearl. The Coast Guard says it was told the woman fell from the deck of the ship, 22 miles off the coast of Cuba. The cruise ship company said it wasn’t an accident.

“A female guest was observed intentionally going overboard while the ship was sailing in the Yucatan Channel,” Cruise Norwegian said in a statement. The cruise line says it deployed three rescue boats and notified the Coast Guard.

The Coast Guard sent a cutter and an airplane to assist in the search, which was made more difficult by rain and darkness.

The incident happened on the first day of the so-called Mad Decent Boat Party, an electronic dance music event, as the ship sailed from Miami to Cozumel, Mexico.

On its website, the Mad Decent Party is advertised as a “crazy boat adventure…for four days of friends, fun, sun and non-stop music.”

The cruise features performances by electronic dance icons Diplo and Skrillex.

Man falls from one cruise ship, is rescued by another

CNN’s Dave Alsup and John Couwels contributed to this report