The board chief executive Wasim Khan said the players can rejoin the squad of 18 players if they later test negative.
The International Cricket Council is investigating an incident where Pakistan's Sarfraz Ahmed appeared to taunt South African player Andile Phehlukwayo using racist and derogatory terms in a one-day game.
Nasir Jamshed, who played 48 one-day internationals and two tests, was suspended from all forms of cricket in February 2017 for violating the PCB’s anti-corruption code.
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