"You (Kejriwal) are abusing your position and misusing public money to promote and project yourself as someone who actually you are not," Amarinder said in a statement here.
"Kejriwal is suffering from chronic megalomaniac obsessions," the statement added, referring to Kejriwal's letter to the Prime Minister which was published in full page advertisements in newspapers in Punjab today.
Questioning the Aam Aadmi Party leader's credentials, the former Punjab Chief Minister alleged, "This is no less than cheating and fraud with the people of Delhi whose money is being wasted in advertisements in Punjab with an eye on the elections."
"It is natural for a Prime Minister to read a letter written to him by a chief minister. So, where was the need to waste public money using newspapers with full page advertisements as the medium," the statement added.
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"More than seeking justice for the 1984 (anti-Sikh riots) victims, as he claims, which he could have done in a better way without wasting public money and newsprint space, Kejriwal is trying to pronounce and proclaim himself as the new messiah as if ordained by a divine decree," the Punjab Congress chief said.
Punjab is scheduled to go to Assembly polls in 2017.