Clashes have broken out as protesters led in convoys by cricketer-turned-politician Imran Khan and a populist cleric advanced on the Pakistani capital to try to topple the government they say was elected by fraud.
Khan and preacher Tahirul Qadri say the May 2013 general election that brought Prime Minister Nawaz Sharif to power in a landslide was rigged, and are demanding he resign and hold new polls.
They plan to rally in Islamabad to press their claims, at the end of a "long march" - in reality a motorised cavalcade - which set off on Thursday from the eastern city of Lahore, around 300 kilometres away.
Police and witnesses said activists from Khan's Pakistan Tehreek-e-Insaaf (PTI) party clashed with supporters of Sharif's Pakistan Muslim League-N (PML-N) in the town of Gujranwala, 200 kilometres southeast of Islamabad.
Khan said shots were fired on his march, telling ARY television news: "They threw stones at us while standing at police vans. They fired bullets at us."
However, police said there were no shots and an Agence France-Presse photographer at the scene also heard no gunfire.
"Workers of PTI and PML-N clashed in Gujranwala and threw stones at each other," a police spokeswoman said. "There was no firing incident."
The photographer said a group of up to 40 youths who were following the convoy and shouting slogans clashed with workers from Khan's party before being dispersed by police.
Marvi Memon, a PML-N member of parliament and spokeswoman, said the events in Gujranwala were "regrettable" but said there was no shooting and her party's workers had been provoked by what she called Khan and Qadri's "violent speeches".
Punjab Chief Minister Shahbaz Sharif, the premier's brother, ordered an investigation into the clashes and appealed for calm.
Supporters of PTI, which came third in last year's election, lined up to welcome the convoy in towns along the Grand Trunk Road which links Lahore and Islamabad.
Exact numbers on the march were difficult to judge, and more people are likely to join it as it passes through towns along the route, but Khan already hailed it a success.
"I can only see that the monarchy is nearing its end," Khan said, referring to Sharif.
"The people have decided as I had said that one million people will come to Islamabad, and they have come out."
Both Khan and Qadri had originally planned for their marches to converge on Islamabad on Thursday, Pakistan's independence day, but it now looks likely that neither will reach the city before late on Friday.
A spokesman for Qadri, the head of his own Pakistan Awami Tehreek (PAT) movement, said their convoy was further along the road to Islamabad than PTI's, in the town of Jhelum, about 120 kilometres south of the capital.
"Our convoy is moving at a very slow pace and we expect our arrival in Islamabad very late tonight," he said.
Security in Islamabad has been ramped up in recent days, with more than 20,000 police and security forces on the streets.
After days of speculation that the authorities would seek to stop marchers entering the city, Interior Minister Chaudhry Nisar Ali Khan said on Thursday that both parties would be allowed to hold rallies.
Almost all roads into the city had been blocked with barbed wire and shipping containers, but many barriers were removed on Friday.
Government officials have accused the march organisers of trying to derail democracy and Sharif said the marches were a distraction from more pressing issues.
PML-N spokeswoman Memon said Khan had ignored constitutional routes to address his grievances, including an offer by Sharif to set up a judicial commission to investigate rigging allegations.
Share
