A dead sperm whale that washed ashore in a national park in Indonesia had nearly 6kg (13 lbs) of plastic waste in its stomach, park officials say.

Items found included 115 drinking cups, four plastic bottles, 25 plastic bags and two flip-flops.

The carcass of the 9.5m (31ft) mammal was found in waters near Kapota Island in the Wakatobi National Park late on Monday.

The discovery has caused consternation among environmentalists.