"The International Cricket Council (ICC) has confirmed that Shabbir was reported by umpires Darrell Hair and Billy Bowden after reviewing footage of his action taken during the fifth and final One-day International between New Zealand and Pakistan in Wellington, on Saturday," said a Pakistan Cricket Board (PCB) spokesman.
"As per the rules we will work on Shabbirs action after the team's return from New Zealand on Wednesday," the spokesman said on Sunday.
Shabbir's action was first reported by South African referee Peter van der Merve in 1999 and was modified by former West Indian great Michael Holding.
"Match Referee, Chris Broad of England, has informed both the ICC and the player's team management of the report as per the ICC regulations governing the reporting process," ICC General Manager, Cricket, David Richardson was quoted as saying in the ICC release.
"The umpires asked to review footage of Shabbirs action from the match and after seeing this footage decided to report the bowler to the ICC," said Richardson.
Shabbir, 27, will be able to continue playing in the meantime. The ICC regulations detail a two-stage process for bowlers reported for suspect actions.
The player is now under Stage One of the process, which allows him to to play International cricket while working with advisors to be appointed by his home Board and a human movement specialist from an ICC specialist panel to review his bowling action. This stage lasts up to six weeks.
At the end of this period, a detailed report will be compiled by the PCB and submitted to the ICC. This will then be circulated to all ICC Match Referees and Elite Panel umpires for information and reference.
No further report can be lodged within this six week period. However, the bowler remains subject to being "called" on the field by an umpire in accordance with the laws of the game.
Stage Two of the process applies if, after the six week period expires, a second report is lodged.
A formal hearing is then held by the ICC's Bowling Review Group (BRG) and the player may be banned from the game for 12 months or until the BRG is satisfied that the concerns over his action are rectified before the expiration of this time.