Shark kills US tourist

A US tourist has been killed by a tiger shark while diving off a Costa Rican island in the Pacific Ocean, the government and local media reported.

A 26-year-old male Costa Rican diving guide leading the group that included the 49year-old American woman was also badly injured in the attack.

The shark savaged the two as they were surfacing after a dive off Coco Island, a pristine national park located 500km off the Costa Rican mainland, the environment ministry said in a statement.