Former Pakistan Prime Minister, Imran Khan, was shot in the shin on Thursday after his anti-government protest convoy came under attack in the eastern part of the country.
Khan’s aides said the attack was a clear assassination attempt.
Several others in the convoy were wounded, while the information minister said a suspect had been arrested.
One party member said there were reports one person had been killed.
“It was a clear assassination attempt. Khan was hit but he’s stable. There was a lot of bleeding,” Fawad Chaudhry.
“If the shooter had not been stopped by people there, the entire PTI leadership would have been wiped out,” a spokesperson for Khan’s Pakistan Tehreek-e-Insaf (PTI) party, told Reuters.
Local media showed pictures of 70-year-old Khan waving to the crowd after being evacuated from his vehicle following the shooting.
He was taken to hospital in Lahore after the attack in Wazirabad, nearly 200 km (120 miles) from the capital, Islamabad.
Protesters stormed streets in some parts of the country as PTI leaders demanded justice.
Pakistan has a long history of political violence. Former Prime Minister Benazir Bhutto was assassinated in December 2007 in a gun and bomb attack after holding an election rally in the city of Rawalpindi, next to Islamabad.
Her father and former Prime Minister, Zulfikar Ali Bhutto, was hanged in the same city in 1979 after being deposed by a military coup.
Former cricketer Khan was leading a protest march on Islamabad to demand snap elections. There were hundreds of people in the convoy.
Party colleague Faisal Javed, who was also wounded and had blood stains on his clothes, said: “Several of our colleagues are wounded. We heard that one of them is dead.”
Prime Minister, Shehbaz Sharif, condemned the shooting and ordered an immediate investigation.
Since being ousted in April through a parliamentary vote, 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.
Imran 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.
