A shoe was hurled at Bharatiya Janata Party (BJP) spokesperson GVL Narasimha Rao during a press conference at party headquarters in New Delhi on Thursday.
The shoe hit his right shoulder.
The man, identified as Dr Shakti Bhargava from Kanpur, was later held by the security personnel and was pushed outside the presser.
Bhargava's mother, in conversation with India TV, said she had disowned her son almost two years back and he has got nothing to do with the hospital she owns.
The man is now being questioned at the IP Estate police station.
Rao was holding the press conference with another senior BJP leader Bhupendra Yadav.
From what we know, chaos ensued after the incident.
The incident took place in the backdrop of the second phase polling of the Lok Sabha election.
The polls are being held in seven-phases for 543 seats on April 11, April 18, April 23, April 29, May 6, May 12 and May 19. The counting of votes will be held on May 23.