Gurbachan Singh, 40, allegedly hurled the shoe towards Badal, which first hit security personnel and then touched 89-year-old Badal's turban, police said.
Chief Ministers of a number of states including those from Gujarat, Bihar, Tamil Nadu and West Bengal on Saturday skipped the meeting of the prime minister-led National Integration Council in New Delhi.
Often credited with his party's victory in the 2012 assembly polls, now 59, he became the youngest chief of the Shiromani Akali Dal, when he was elevated to the post in 2008.
Noted educationist and freedom fighter Madan Mohan Malviya was on Monday posthumously conferred the Bharat Ratna, the country's highest civilian award, by President Pranab Mukherjee.
In the years to come, Dushyant may need to compete for the leadership of the Jat community with Hooda's son Deepender, and other Jat leaders, reports Archis Mohan.
Modi flagged off the first batch of pilgrims led by Akal Takhat Jathedar Giani Harpreet Singh to Gurdwara Darbar Sahib through the corridor, which was thrown open days ahead of the 550th birth anniversary of Guru Nanak Dev on November 12.
The high-voltage campaign for the February 4 assembly elections in Punjab came to an end on Thursday evening following hectic campaigning by various political parties.