Australia's Michael Slater takes evasive action

It came just over two years after he was first accused of throwing during a Test match in Australia.

Foster said, however, that the team, which also included Australian fast bowling great Dennis Lillee, were "very convinced" that Akhtar's action was within the laws of the game.

"When he first came, we analysed the action and decided he had unique physical characteristics - that he had hyper-mobility in both his shoulder and elbow joints.

"This leads to a certain perception or illusion, that looks like he might be throwing."

Akhtar was filmed from various angles at 200 frames per second and maintained a delivery speed of around 150 kph (93 miles per hour) during the tests.

"It's not possible for a bowler to bowl close to 150 kph with one action and then switch action to avoid scrutiny," Foster told the Associated Press.

Muralitharan was also cleared by the UWA team

"The three-dimensional analysis, using two and four cameras in two separate tests, proved conclusively that his physical abnormality was the cause of his arm going into hyper-extension - which he can't avoid - and that's where the illusion is that he's throwing."

Foster is to act as a cricket consultant to the Pakistan team during the tour of England, despite turning down the chance to be their coach.

"I will accept the offer to go and see Shoaib through some traumatic times and help the other bowlers in the squad," he said.

He has suggested some minor changes to Akhtar's style, but insisted they were intended to help him avoid future injury problems.

Akhtar is the second high-profile cricketer to be given the all-clear by the UWA team.

They proved Sri Lankan spinner Muttiah Muralitharan's action was a result of his his arm being permanently bent 40 per cent more than normal because of an anatomical irregularity.