Maharashtra Chief Minister Ashok Chavan has ordered Shiv Sena activists to behave themselves after they attacked several cinema halls across Mumbai that would screen Shah Rukh Khan's latest film.<br/><br/>Chavan also threatened to withdraw the security provided to the party's executive president Uddhav Thackeray. Chavan's statement came as the Shiv Sena threatened to intensify their agitation against Shah Rukh's film "My Name is Khan".<br/><br/>The party stepped up its protest against the film over the actor's remarks favouring inclusion of Pakistani cricketers in IPL.<br/><br/>According to the police, in the last 24 hours, a total of 1,023 Sainiks have been arrested. While 955 were picked up under the preventive action, the rest were put behind bars for different cases, including for protesting outside the theatre and vandalising screens among others.<br/><br/>In a fresh development, several multiplexes and single screen theatres across the city including Cinemax, Big Cinema, Fun Republic and Adlabs have stopped advanced booking of the film 'My name is Khan' fearing demonstration and damage by the Shiv Sena activists.<br/><br/>Meanwhile Shiv Sena activists continued their protest and attacked theatres in Kandivli and Juhu suburbs on Wednesday to stall the release of the film. The police said tight security has been provided to 63 theatres across the city where the movie is scheduled to be released on February 12.<br/>