California ? The Coast Guard suspended its search Saturday for an elderly couple believed to have fallen off a cruise ship between Long Beach and northern Mexico.

The aerial search for the 90-year-old man and his 79-year-old wife was halted after officials determined that their chances of surviving in the water were slim, said Chief Warrant Officer Scott Epperson.

The couple were last seen Tuesday aboard the Carnival Paradise.

Miami-based Carnival said their cabin door was double-locked from the inside with a “Do Not Disturb” sign on the handle. Their belongings remained inside and the door leading from the cabin to the private balcony was unlocked.