The FBI is investigating sexual assault allegations on a Carnival cruise ship. An FBI spokesperson told KHOU 11 that the alleged sexual assault incident took place onboard the Carnival Breeze ship based out of Galveston, Texas. The incident happened on a cruise that returned to Galveston on Monday.

GALVESTON, Texas — The FBI is looking into allegations of a sexual assault aboard a Carnival cruise ship out of Galveston. According to the FBI, it happened aboard the Carnival Breeze. At this point, it’s not clear exactly when the incident took place.

Passengers on the ship told said they woke up to the sound of sirens at around 3 or 4 a.m. Wednesday, and one heard a request for medical assistance on one of its decks, according to KHOU.