The 27-year-old, who has yet to play international cricket for the West Indies but had featured in first class cricket for his native Trinidad and Tobago, was reported during Tuesday’s game between Lahore and Quetta in Dubai.
The Pakistan Super League (PSL) release said Cooper had been put on a warning list for the moment.
“Lahore bowler Cooper has been reported for suspect action by match officials,” said a PSL release.
“Under the PSL Suspected Illegal Bowling Action policy, if a player is reported while on the warning list, the player shall be suspended from bowling for the remainder of the PSL tournament and from bowling in any matches organized by the PCB until such date as he is cleared or upon conclusion of any ineligibility period,” said the release.
“A player suspended from bowling may continue to be selected to play in matches, however, he will not be entitled to bowl.