The Pakistan Cricket Board (PCB) said Irfan and two others had been questioned following the decision to suspend Khan and Latif and boot them out of the Pakistan Super League (PSL).
"The PCB’s anti-corruption unit is continuing with inquiries to root out corrupt practices and to safeguard and protect the integrity of the PSL," said a PCB release.
"As a part of the investigations Irfan was also questioned. He does not face any immediate suspension. PCB’s ACU has also questioned Shahzaib Hasan and Zulfiqar Babar."
Irfan, at 7f 1in (2m16) the tallest international cricketer ever, has played four Tests, 60 one-day internationals and 20 Twenty20 matches since making his debut in 2010.
He was part of Pakistan's one-day squad on last month's tour of Australia but returned home after the death of his mother.
PSL chairman Najam Sethi said the probe will continue.
"All three players will continue to play while the ACU will remain vigilant and continue to protect the PSL from the menace of corruption," said Sethi.
Islamabad United left out Irfan from their team for their match against Lahore Qalandars on Saturday.
Hasan, who featured in Pakistan's World Twenty20 winning team in 2009, plays for Karachi Kings while Babar represents Quetta Gladiators.
Babar has played 15 Tests, five one-day and seven Twenty20 internationals.