The News quoted sources as saying that the three Pakistani stars, who were not named in the Pakistani squad for next month's Twenty20 World Cup in South Africa, signed the contracts yesterday.
''The amount of the contract was tempting and it wasn't possible for the cricketers to have a second thought,'' the newspaper said, quoting sources.
Another report in The Dawn, however, quoted Razzaq as denying to have signed the ICL contract.
Yousuf and Razzaq had yet to sign Pakistan Cricket Board's (PCB) central contract.
Reports said Razzaq, who criticised PCB for not selecting him for the Twenty20 World Cup, was considering not signing the PCB central contract in protest.
Yousuf though had said he would sign the contract later this month even as the PCB deadline expired today.
Farhat's case is different. He had already signed the PCB central contract.
The PCB has already announced that any player, who joins the ICL, will face a ban. However, former Test cricketers Javed Miandad and Intikhab Alam have supported the players who wanted to play in the ICL, saying it is their right.