<br/>The Prime Minister Dr Manmohan Singh has said that Naxalism is the greatest threat to internal security and the government is taking all possible measures to deal with this menace. Talking to media persons in Mumbai on Sunday, the Prime Minister said that government is not in favour of using armed forces against naxals. He said dialogue with them is possible only if they shun violence. Replying to a question that certain sections in Pakistan are accusing India of the violence in that country, the Prime Minister said, this is totally false.<br/><br/> The Prime Minister has ruled out government curbs on salaries of Chief Executive Officers of private companies. Dr. Manmohan Singh said the government believes that salaries are best determined by boards of various companies and government as such has no role to play in this regard.<br/>