Altaf Hussain, oneself banished originator of one of Pakistan's greatest ideological groups, has been captured in the UK, his representative has said.
The Metropolitan Police would just affirm that a man in his 60s had been held in an examination concerning talks identified with his MQM party.
Mr Hussain, 65, mentioned refuge during the 1990s and later picked up UK citizenship.
Notwithstanding a split in the MQM, regardless he uses impressive impact in the gathering and its fundamental power base, Karachi.
Reporters state Mr Hussain is a free thinker government official who has urged a character clique to develop around him.
His representative Qasim Raza affirmed to the BBC Urdu administration that he had been brought in to be interrogated.
The Muttahida Qaumi Movement (MQM) has commanded legislative issues in Karachi for three decades due to its help in the thickly populated average workers neighborhoods of Urdu-speaking Muhajirs, relatives of Muslims who moved from India when Pakistan was made in 1947.
From his deliberate outcast in London, Mr Hussain would address hordes of supporters of his MQM party in Pakistan through phone.
The Pakistani experts have over and over requested move be made against him - yet his supporters have constantly kept up his honesty.
What does the Met explanation state?
It doesn't name Mr Hussain, alluding rather to "an individual related with the Muttahida Qaumi Movement in Pakistan".
He was captured at an "address in north-west London... on doubt of deliberately promising or helping offenses as opposed to Section 44 of the Serious Crime Act 2007". The man stays in guardianship.
Two premises are being looked, in an examination driven by the Met's Counter Terrorism Command.
It centers around "a discourse communicate in August 2016 by an individual related with the MQM development in Pakistan just as different talks beforehand communicated by a similar individual".
1984: Founded as the gathering of Urdu-speakers who relocated from India at the season of the 1947 parcel, known as Muhajirs
1988: Wins all seats in Karachi, turning into Pakistan's third biggest gathering
1992: Altaf Hussain leaves the nation after a capture warrant is issued in a homicide case; armed force professes to have busted "dungeons" utilized by MQM activists to rebuff adversaries
2009: Under a 2009 reprieve in Pakistan 72 bodies of evidence are dropped against Altaf Hussain, including 31 charges of homicide
2015: MQM wins neighborhood government race with a tremendous edge in Karachi
2016: The gathering parts into two: a group driven by Altaf Hussain - the MQM-L - in London, and one in Pakistan - the MQM-P - which is against him.
2018: The MQM-L group blacklists the general decision, refering to what it calls the military's abuse of Muhajirs. The MQM-P wins seven seats and turns into an individual from Pakistan's administering alliance