Plane crash at popular summer holiday island

Emergency services, including water police, and civilian vessels are attempting to rescue the crew. 

It is not known how many people were on the privately owned aircraft when it crashed.

Rottnest Island, which is also known as Wadjemup, is located about 20 kilometres off the coast from Perth.

It's a popular holiday spot in the summer months attracting thousands of visitors.

The island, which is also home to the world-famous marsupial quokkas, has a small airport and various companies offer flights to and from the mainland.