Terming the Sri Ram Sena as a "threat" to the country, Home Minister P Chidambaram [Images] on Monday said the Centre was watching its activities and expected the Karnataka government to take firm action against the outfit, accused of being involved in the Mangalore pub attack.

"Sri Ram Sena is a threat to the country. The Centre is watching its activities with great concern," the minister told media persons in Kollam, Kerala [Images].

Condemning the activities of the outfit, he said: "No organisation can become a self-styled police force. That cannot be allowed. Sena had already crossed limits. They cannot say what one should wear, one should eat or to where one should go."

Asked if the Centre could impose ban on the outfit, he said: "Let us see what the Karnataka government is doing. We expect Chief Minister Yeddiyurappa to take firm action against them as promised."

Members of the Sena were allegedly involved in the attack on women at a pub in Mangalore on January 24, which sparked a national outrage.