Shane Warne: Thai police investigating after woman allowed into ambulance with Australian cricketer's body

Thai police have questioned a German woman who got into the back of the ambulance transporting the body of Australian cricket legend Shane Warne from the island of Koh Samui.

The woman, carrying a bunch of flowers, was allowed to spend about 40 seconds alone in the van, raising serious questions about security surrounding the transportation of Warne's body. 

It also raises questions about why neither Thai nor Australian officials appeared to be with the ambulance while it was parked on the ferry.

Warne died on March 4 at a luxury resort villa on Koh Samui where he was staying with three friends. 

While police say they suspect he may have had a heart attack, his body was being transported by ferry to a Thai hospital for an official autopsy on March 6. 

But as the ferry made its final preparations to leave Koh Samui for the mainland, the ABC captured footage of two women approaching the ambulance. 

In the footage, a blonde woman can be seen with a Thai woman who is talking to local immigration officials near the vehicle ramp down to the car ferry.

When the official points to the vessel, the Thai woman bows.

In English, she says: «Yeah, yeah she knows him.»

In Thai, she then says: «Thank you very much, she's a friend.» 

The pair is then escorted by a man through rows of cars to the front of the vessel, where the ambulance was parked. 

As they reach the back of the van, the blonde woman approaches the ambulance driver's window.

She shows the flowers to the driver, and they have a brief exchange before he gets out and takes her to the other side of the van.

He opens the sliding door, allows her to get in, then shuts the door behind her. 

Australia's ambassador to Thailand Allan McKinnon and Department of Foreign Affairs and Trade (DFAT)