THIS is the terrifying moment a pod of killer whales sinks a tourist yacht off the coast of Portugal in yet another dangerous attack.

The sailboat carrying five people went down after orcas repeatedly rammed the hull of the vessel near Fonte da Telha beach.

Footage shows an orca repeatedly striking the sailboat which belonged to the Nautic Squad Club.

After several blows, the vessel can be seen tilting dangerously from side to side before slowly submerging and sinking to the bottom.

Do you know who was on this yacht? If so, please email harvey.geh@news.co.uk

The five people aboard the Nautic Squad boat were rescued while nearby vessels tried unsuccessfully to tow it to safety.

It sank soon afterwards.

The Maritime Authority said the Lisbon Maritime Search and Rescue Coordination C

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