Pakistan Tehreek-e-Insaf Member National Assembly Zain Qureshi resigned as deputy parliamentary leader, 24NewsHD TV channel reported on Saturday.
Zain Qureshi said he resigned from the post in reply to a party show-cause notice in the wake of his dubious role over the matter of the 26th constitutional amendment.
He added: "I have replied to the show-cause notice sent by the party. I am resigning from the post of deputy parliamentary leader for free and fair inquiry."
Zain has been facing allegations of having sided with the government against the party's stance on the matter of the 26th Constitutional amendment.