Update, 9 a.m. EDT: According to Kathimerini, the Greek port authority said that "The Aegean Pearl sustained minor damage from the jolt, while the larger Maltese vessel emerged relatively unscathed." Aegean Pearl has headed to Neorian Shipyard on Syros for repairs. The ship will be out of service for a week. Stay tuned.

Two cruise ships have collided in Greece's main port of Piraeus, Athens, this morning, causing damage but no injuries.

The International Herald Tribune and the Athens News Agency are reporting that Spanish-based Pullmantur ship Zenith with 1,819 passengers onboard, hit the Greek-flagged Aegean Pearl, with 504 passengers onboard, as it was manoeuvring to dock in the port.

The Merchant Marine Ministry has said that nobody was injured but the port authorities were not allowing the ships to sail until the damage was assessed. Passengers remain onboard the ships.

We'll keep you posted when we learn more.

--by Kelly Ranson, U.K. Editor