In the notice issued by Delhi Police's Crime Branch, which is probing the matter, Singh has been asked to join investigation of the case at the RK Puram Sector 8 office of Crime Branch at 12.30 PM tomorrow, the notice said.
Joint Commissioner of Police (Crime) Ravindra Yadav confirmed that the notice has been sent under Section 160 of CrPC.
Reacting to the notice, Singh alleged that Delhi Police has resorted to a "shameful machination".
"Modi ji's police has sent a notice in connection with farmer Gajendra Singh's death around one year after the incident took place, it is a shameful machination," Singh tweeted.
On April 22, Gajendra Singh, a farmer from Rajasthan allegedly committed suicide by hanging himself from a tree in full public view in the presence of Delhi Chief Minister Arvind Kejriwal at an Aam Aadmi Party rally in New Delhi's Jantar Mantar area.
Later, the case was transferred to Delhi Police's Crime Branch.
