The International Cricket Council has warned India coach Greg Chappell [Images] to refrain from making any comment on the bowling action of Pakistani paceman Shoaib Akhtar [Images] or face disciplinary action.

"The ICC [Images], through the channels concerned, has conveyed to Chappell that he had no business making such remarks about Shoaib on any media platform and in future should refrain from such remarks or face disciplinary action under the ICC code of conduct," a Pakistan Cricket Board source was quoted as saying by The News in Peshawar on Tuesday.

According to the source, match referee Ranjan Madugalle had spoken to Chappell after receiving a letter from the Pakistan team management before putting it to ICC, which had got in touch with the Australian.

In the letter, the Pakistan team management had asked Madugalle to find out from Chappell if he had indeed made the remarks attributed to him.

The former Australian captain is believed to have told a TV channel that there was "something seriously different" about Shoaib's action while challenging the biomechanic findings and calling for fresh tests.