One person has been slightly injured after the boats hit each other.
A video posted online shows the two Carnival Cruise Line ships crashing into each other, damaging the stern on one vessel, in the port of Mexico's island of Cozumel.
No other serious injuries have been reported while the cruise operator says their itinerary remains unaffected.


Man charged with 10 counts of attempted murder after knife attack on UK train
Tanzania's Hassan sworn into office after deadly election violence
Powerful 6.3 quake kills at least 20 in Afghanistan, hundreds injured
Turkey set to call for action on Gaza as soon as possible, source says
