Agartala, Nov. 24 :     The BJP and its allies in Tripura have taken exception to Union home minister L.K. Advani?s stand on imposition of President?s rule in the state. Expressing ?shock and dismay? over Advani?s statement in New Delhi on Monday, state BJP leaders said the former should have assessed the situation properly before taking such a step. BJP president Kushabhau Thakre had made a case for imposition of President?s rule in Tripura during his recent visit to Calcutta. He said the killing of 18 non-tribals by All-Tripura Tiger Force militants at Panchabati on November 14 was proof of the Left Front government?s inability to maintain law and order. However, Advani contradicted the BJP chief?s stand in New Delhi on Monday, saying ?There is no question of imposing President?s rule in Tripura.? BJP leaders from Tripura and representatives of the party?s allies held a meeting here yesterday to find ways to pressure the party leadership into recommending the dismissal of the Left Front ministry. Sources said the BJP, the Trinamul Congress, the Tripura Upajati Juba Samity and the Janata Dal (United) decided to launch a joint agitation against the Left Front government tomorrow. Leaders of the four parties also decided to visit New Delhi next month to meet the Union home minister. Chief minister Manik Sarkar is already in New Delhi for a meeting with Prime Minister Atal Behari Vajpayee. He is expected to seek additional security forces for Tripura during his meeting with the Prime Minister. Chief secretary V. Tulsidas and director-general of police KT.D. Singh are accompanying the chief minister. The meeting was convened by Vajpayee due to the spurt in violence in Tripura and demands for the Left Front government?s dismissal. Shortly after being informed that the Prime Minister wanted to meet Sarkar, the Left Front issued a statement saying that the Centre had virtually ruled out imposition of President?s rule in the state.