A six-year-old boy and a man have died in hospital after they were trapped in a tourist boat that sank on the River Seine in a rare accident in the heart of Paris. Police said divers pulled the child and man from inside the boat minutes after the sinking and rescuers tried to resuscitate them. The nationalities of the victims are not yet known. Ten other tourists jumped off the boat into the river and were rescued. Authorities said they did not know how many people were on board when it collided with the Pont de l'Archeveche, which links the tip of the Ile de la Cite where Notre Dame cathedral is located to the Left Bank of the river. Two people, the pilot and co-pilot of a "bateau-mouche", one of the long flat-bottomed barge-like boats that carry hundreds of tourists, have been placed in police custody as part of the investigation into the sinking. Authorities first said the boat had hit a pillar of the bridge, but later said it was possible it had collided with a bateau-mouche. Investigators are now focusing on the possibility of a collision.