GALVESTON, Texas -- The U.S. Coast Guard was searching the Gulf of Mexico for a passenger missing from a cruise ship, CBS affiliate KHOU reported.

Surveillance video from the Carnival Liberty showed a woman falling overboard about 2 a.m. Friday, the station said.

All passengers were checked and 33-year-old Samantha Broberg was found to be missing, according to a Coast Guard statement.

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A Coast Guard aircraft was dispatched from Mobile, Alabama, to search the area about 200 miles southeast of Galveston, where the ship departed Thursday on a four-day cruise to Mexico.

Carnival officials said they were "providing support to the guest's traveling companions and family. We are keeping our guest and her loved ones in our thoughts during this difficult time."