BJP Rajya Sabha member Subramanian Swamy on Monday joined the hunger strike led by his party MP Mahesh Girri outside Delhi Chief Minister Arvind Kejriwal's residence and demanded his "apology" over allegations on the M.M. Khan murder."There is no surprise the way in which Kejriwal is acting. He is a Naxalite by nature. All allegations levelled against Girri by him (Kejriwal) are completely wrong," Swamy said while addressing the party workers here."If there is a letter then Kejriwal should present it, if not he should apologise," the Bharatiya Janata Party (BJP) leader said. Girri had been sitting on a hunger strike outside Kejriwal's residence since Sunday. Attacking the Aam Aadmi Party (AAP) ministers, Swamy said, "All AAP ministers are thieves. Look how each one of them are resigning." Swamy also slammed Delhi Lt. Governor Najeeb Jung and said "he must be dismissed".Girri, who represents East Delhi in the Lok Sabha, has dared Kejriwal to a public debate over the allegations and asked him to produce evidence to back the charges. Khan, an estate officer with NDMC, was shot dead here on May 16 in Jamia Nagar, a day before he was expected to pass an order on the terms of the lease of The Connaught, a four-star hotel.