Mumbai, Feb 10 (IANS) Maharashtra Chief Minister Ashok Chavan Tuesday night ordered Shiv Sena activists to "behave themselves" after they attacked several cinema halls that would screen Shah Rukh Khan's latest film. 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".

Responding to the threat, Uddhav said he would himself return the security provided to him.

"Let them provide all the security to Kasab," he remarked sarcastically, referring to the sole terrorist in the 26/11 attack captured alive and currently lodged in the high-security Arthur Road central jail.

Senior Shiv Sena leader Subhash Desai said all the party legislators would also return the security provided to them.

Meanwhile, state Home Minister R.R. Patil said Uddhav's security was intact and full security would be provided to Shah Rukh as well as to the theatres screening the movie due for release Friday.

In a related development, Mumbai Police Tuesday night rounded up "trouble makers" and Sena activists and had nearly detained 400 people.

"My Name Is Khan" has been under the Shiv Sena scanner ever since superstar Shah Rukh made comments in favour of the inclusion of Pakistani cricketers in the Indian Premier League (IPL). Shah Rukh is co-owner of the Kolkata Knight Riders team.

Not willing to settle for anything less than an apology from the star for his pro-Pakistani cricketers comments, the Sena also called him "a traitor".