Japanese police said yesterday they were investigating the escape of four dolphins from a park in a Japanese town that has gained international notoriety for staging an annual slaughter of the mammals.
A fisherman in the city of Taiji noticed that four bottlenose dolphins from the facility were swimming outside their netted enclosure in the early morning, police said.
"We are investigating the case on suspicion of criminal damage," a police official said.
He said two of the nets at the DolphinBase park were apparently cut with a sharp object, allowing the mammals to escape, before three of them returned to the enclosure of their own volition. A fourth dolphin was swimming nearby.