"The Australian authorities have apologised for the incident and the Sri Lankan team's security has been beefed up," Sri Lanka Cricket (SLC) secretary K Mathivanan said.

Showing no let up in their hostility towards Muralitharan, a group of fans threw an egg on his face in Hobart on Friday night.

The incident marked a new low in Aussie fans' turbulent relations with Muralitharan.

Mathivanan said Cricket Australia will also keep a close watch on crowd behavior during the ongoing tri-series in which Sri Lanka is one of the teams along with Australia and India.

"Australian authorities will keep an eye on the hotel's security. They have already announced that anybody misbehaving fan would be thrown out of the ground," Mathivanan said.

Muralitharan, who holds the world record of most Test wickets with 723 scalps, has had a history of hostility with the Australian spectators, who have jeered him on previous tours, forcing him to stop going Down Under for some time.