Omar wished good luck to the voters in Delhi. "Good luck voting today Delhi. Aap achay say vote ka istemal karen (Cast your vote cleverly) ;-) #Delhi2015," he wrote on micro-blogging site Twitter.
He also said it clearly demonstrates the writing on the wall when the political parties accuse their opponents of playing dirty tricks on the poll day.
Referring to today's Rajya Sabha elections in Jammu and Kashmir, Omar, the National Conference (NC) working president, said Congress leader Ghulam Nabi Azad would give the BJP "something to think about" in the state, while expressing hope that AAP would do the same in Delhi polls.
Azad, leader of opposition in Rajya Sabha who is seeking re-election, is contesting the polls with the support of the NC.
"You know the writing is on the wall when political parties start accusing their opponents of dirty tricks on polling day #Delhi2015," Omar wrote.