Carnival Cruise Lines has suspended the nature trail tour from its list of activities for cruise passengers near Puerto Vallarta after 22 guests were robbed by hooded gun men, the Los Angeles Times is reporting.

The tourists, who departed Long Beach, California on Feb. 19 and returned Sunday, were on their way to a nature hike Friday when the bandits struck near Puerto Vallarta, according to local media reports.

The gunmen stole the passengers' valuables -- including cameras and money -- before fleeing. No one was reported to have been hurt during the robbery.

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"Carnival sincerely apologizes to its guests for this very unfortunate and disturbing event and is providing its full support and assistance," the Miami-based company said in a statement.

"Carnival is working with guests to reimburse them for lost valuables and assist with lost passports or other forms of identification."

The tour operator has come under fire for allegedly not following proper security procedures. Tours are only supposed to be conducted during the mornings and they should be conducted with a security guard or police officer on board, Puerto Vallarta Mayor Salvador Gonzalez Resendiz told the Times. 

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