The Delhi Police will tighten security in the central parts of the national capital today as hundreds of Aam Aadmi Party (AAP) workers and supporters gather to protest after its shock defeat in Chandigarh Mayoral polls. The party will protest the alleged cheating in the key polls, news agency PTI reported. Delhi Chief Minister Arvind Kejriwal and his Punjab counterpart Bhagwant Mann will reportedly join the protesters.