A man has died after he was bitten by a shark off the south coast of Michaelmas Island in Western Australia.

The 35-year-old was attacked while spearfishing with his family close to the town of Albany, police said.

The man was treated by paramedics but died of his wounds.

Police said a 4.5metre (15ft) shark of an unknown species was spotted by a witness near Michaelmas Island, which does not receive many visitors.

The state’s Department of Primary Industries and Regional Development urged people to take “additional caution” in the area and to stay abreast of shark sightings.

This is the fourth shark killing this year in Australia.

Last month, a man died after being attacked by a great white off Rottnest Island near the city of Perth, and another man died in a shark attack off the coast of Queensland in northeast Australia.

In January, a 12-year-old boy was killed by a shark in Sydney Harbour.

Australian scientists believe increasingly crowded waters and rising ocean temperatures are shifting sharks’ migratory patterns, which may be contributing to a rise in attacks.

The majority of shark attacks occur along Australia’s east and southeast coasts, with an average of about 20 incidents recorded each year, according to the Institute of Health and Welfare.