Captain killed, tourists hurt in blast on Greek boat
The cannon had been loaded with explosive powder, such as that found in fireworks.
A coastguard official, who declined to be named, said the captain died in the explosion. Two Dutch passengers, a Belgian and two German children were hurt, a second coastguard official told Reuters.
"Their injuries are not life-threatening," the official told Reuters, adding that a relative of the captain had managed to steer the boat back to port.
The 15-metre ship was carrying 26 passengers at the time.
(Reporting by Renee Maltezou; Writing by Matt Robinson; Editing by Alison Williams)