Some time in the evening of August 8, 1963,
Royal Canadian Mounted Police (RCMP) received an advanced anonymous warning that there would be an attempt on a Cuban ship in
Montreal,
Canada. Before dawn, at 3:11 am on August 9, 1963, a 1.091–ton Cuban
Cargo boat called the
Maria Teresa was rocked with an explosion in front of her bow while moored at Shed 10 in the harbor at Montreal. The explosion sent a wave 30 feet high, and damaged a few windows in a port building, but the ship remained unharmed. The crew mates of the vessel were still asleep. A few hours later, the MNC claimed full responsibility for the attack, and said that its
commandos had boarded the vessel and stole top secret Cuban government documents before a separate team of
frogmen set off an explosive near the ship's hull. == Attack on the United Nations ==