Former Pakistan Prime Minister Imran Khan has been wounded after his convoy was shot at in the east of Pakistan, an aide has said.
A member of Khan's Pakistan Tehreek-e-Insaf (PTI) party said several colleagues were also wounded amid reports one had been killed.
"A man opened fire with an automatic weapon. Several people are wounded. Imran Khan is also injured," Asad Umar said. Khan was taken to hospital.
The attack happened in Wazirabad, nearly 120 miles from the capital, Islamabad.
Imran Khan Reuters
Former cricketer Khan, 70, was leading a protest march on Islamabad to demand snap elections MOHSIN RAZA
Former cricketer Khan, 70, was leading a protest march on Islamabad to demand snap elections.
PTI spokesperson Fawad Chaudhry said a bullet hit Mr Khan's shin.
"Imran Khan and (party colleague) Faisal Javed received bullets wounds. A bullet hit IK's shin. Both have been taken to hospital for treatment," Mr Chaudhry said.
Javed, who had blood stains on his clothes, said from the hospital that "several of our colleagues are wounded. We heard that one of them is dead".
Prime Minister Shehbaz Sharif condemned the shooting and ordered the interior minister to seek an immediate investigation.
Since being ousted in April through a parliamentary vote, Mr Khan has held rallies across Pakistan, stirring opposition against a government that is struggling to bring the economy out of the crisis that Khan's administration left it in.
Mr Khan had planned to lead the motorised caravan slowly northwards up the Grand Trunk Road to Islamabad, drawing more support along the way before entering the capital.
"I want that all of you participate. This is not for politics or personal gain, or to topple the government... this is to bring genuine freedom to the country," Khan said in a video message on the eve of the march.