Tahir-ul-Qadri, the 63-year-old cleric who drew tens of thousands of supporters for a sit-in protest here in January last year demanding electoral reforms, refused to come out of the plane in Lahore saying the aircraft should be taken to its original destination or the army take him in its protective custody.
But later he came out of the Emirates plane after successful talks with Punjab Governor Chaudhry Muhammad Sarwar inside the aircraft.
Qadri along with his supporters then left the airport for Jinnah Hospital where over 50 of them are being treated after clashes with police last week.
The thaw in the standoff came after government refused to involve army for negotiations as Qadri had demanded.
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Many supporters of Qadri's Pakistan Awami Tehreek (PAT) were present outside the airport in Lahore.
Qadri, who has dual nationality, has come back from Canada to lead what he called a "revolution" against the Nawaz Sharif-led government.
Qadri, a religiously moderate cleric who served as a lawmaker under former military ruler General Pervez Musharraf, has a substantial following in Pakistan.
There is widespread speculation in Pakistan that Qadri is being encouraged by Pakistan's powerful military, following recent tensions with the Prime Minister.
Today, police sealed off roads to Islamabad airport but some of the cleric's supporters - chanting "Islamic revolution" and "long live the army" - managed to break through the security cordon.
Over 70 police personnel were injured when PAT workers pelted stones at them near the airport in Islamabad, Radio Pakistan reported.