Mustafa Nawaz Khokhar formally resigns from Senate.

PPP's Mustafa Nawaz Khokar formally resigned as a senator on Thursday, two days after he announced plans to vacate his seat in the upper house of parliament.

'I have formally submitted my resignation today. I'm thankful for the positive response and support across party lines which was far beyond my imagination,' Khokhar tweeted, referring to the appreciation he had received from politicians - mainly PTI leaders - for stepping down as a senator because of the PPP leadership's unhappiness with his 'political positions'.

In a subsequent tweet, Khokar added: 'For those who are speculating about my political future, let me state clearly that I'm not joining any political party. I will try hard to maintain my independence.'

PTI's Fawad Chaudhry responded to Khokhar on Twitter, saying, 'A principled resignation tendered'.

He wished the PPP leader good luck for his future endeavours.

The vocal PPP leader had announced his decision to resign from the Senate on Tuesday saying he was told that the PPP leadership was unhappy with him over the 'positions' he had taken during the recent political developments.

'Met a senior leader from the party today. He conveyed that the party leadership wasn't happy with my political positions...