Haris Rauf and a Pakistani fan got into a heated altercation over some words in USA.
Naqvi, in a strongly-worded social media statement, said he condemned the incident and hit out against the fan, who has been accused of verbally abusing Haris Rauf.
Haris Rauf was seen going down a sidewalk with his wife when a fan interrupted him and appeared to ask for a photograph.
Moments later, Haris Rauf can be seen jumping onto the opposite side of the pavement and arguing with the fan. Rauf was enraged, and the fan came close to fighting before being removed by others.
The PCB chief urged the fan in question to apologize to Haris Rauf and threatened legal action if he failed to do so.
"Strongly condemn the appalling incident involving Haris Rauf. Such actions against our players are completely unacceptable and will not be tolerated. Those who are involved must immediately apologize to Haris Rauf, failing which we will pursue legal action against the individual responsible." Mohsin Naqvi said in a statement.
Meanwhile, Haris Rauf also clarified his side of the story on social media and the whole incident has evoked mixed reactions from the Pakistan cricket fraternity.
Here are some of the reactions from the Pakistan cricket fraternity: