Imran Khan has accused Pakistan Prime Minister Shehbaz Sharif, Rana Sanaullah and Major General Faisal for attack at his rally in Pakistan's Wazirabad.
Imran Khan received bullet injuries in his legs after two men opened gunfire during his long march on Thursday's attack.
"A short while ago, Imran Khan told us to issue this statement on his behalf. He believes there are 3 people on whose behest this was done-Shehbaz Sharif, Rana Sanaullah and Major General Faisal. He said he was receiving information and is saying this on that basis," PTI's Asad Umar & Mian Aslam Iqbal said.
In a statement, the Punjab police said that seven people were injured and one person was killed during the attack. It added that a suspect has been arrested.
Senior Pakistan Tehreek-e-Insaf leader Asad Umar in a video statement said that party chairman Khan has named three suspects who could be behind today's attack.
"Imran Khan called us and told us to convey this message to the nation on his behalf... He said that he believes three people - Prime Minister Shehbaz Sharif, Interior Minister Rana Sanaullah and Major General Faisal (Naseer) - were involved in the attack on him," Umar said.
He said they should be immediately removed from their current
positions.
Khan has warned that "a protest will be held across the country" if the individuals accused by him were not removed from their offices, Umar added.
Dr Faisal Sultan, the former assistant to the prime minister on health, has said that Khan’s condition is stable.
"But according to X-rays and scans, there are fragments of bullets in his legs and there’s a chip in his tibia shin bone,” he told media persons outside the Shaukat Khanum Hospital in Lahore.
Sheikh Rashid, former interior minister and Khan's close aide, has blamed the Shehbaz administration for allegedly hatching a conspiracy to kill the former premier.
"The federal government hatched a conspiracy to kill Imran Khan. Hired assassin (federal Interior minister) Rana Sanaullah and the federal government has brought the country at the brink of civil war. It can't stand before the sea of people as it has to go home," Rashid said.
He also announced protest against the assassination attempt on the life of Khan on Friday in Rawalpindi.
Meanwhile, the Human Rights Commission of Pakistan (HRCP) has said that the attack on Khan must be unequivocally condemned.
"All political parties have the right to hold peaceful assemblies and to expect security from the state when doing so."