Moin went with his wife to a casino for dinner with friends two days before Pakistan were hammered in a 150-run loss by the West Indies in a crucial World Cup match last Saturday.
The former Test wicketkeeper said he was sorry that his actions had offended millions of cricket fans, but was met by an angry throng at Karachi airport as fans smashed eggs on their heads in anger while more protests took place outside his house.
Senior police official Tariq Dharejo said: “We have deployed some police at Moin’s residence for security reasons because people were causing disturbances.”
Gambling and alcohol consumption is prohibited in Islamic Pakistan and Moin admitted his mistake, saying: “I had gone to a casino in Christchurch with friends and family to have dinner.
“In hindsight, the choice of venue for dinner was indeed inappropriate. It has offended the Pakistan public as well as cricket fans.”
Pakistan Cricket Board (PCB) chairman Shaharyar Khan have launched an investigation into Moin’s visit and are due to hold talks with the 43-year-old this weekend.
“I have already explained my position to the PCB chairman and have apologised to him. He has asked me to return home to further clarify my position in person, which I have readily accepted,” added Moin.
Pakistan have so far suffered a torrid time at the World Cup in Australia and New Zealand, losing both of their matches to date to India and West Indies respectively. They are bottom of the seven-team Pool B, which includes non-test playing nations such as Ireland and UAE.
Moin’s expulsion from a World Cup is not a first for Pakistan at a World Cup.
Shoaib Akhtar was sent home from the inaugural World Twenty20 in South Africa in 2007 after he hit fellow fast bowler Mohammad Asif with a bat.