Prime Minister Manmohan Singh [Images] on Monday said the peace process with Pakistan could not go forward unless Islamabad firmly dealt with cross-border terrorism.

"This cannot go forward if Pakistan does not deal with terrorism firmly. What has Pakistan done to control terrorism?" the prime minister said.

Asked whether the frozen peace process would restart as the NAM summit at Havana was around the corner, Singh replied that it was too early to say if it would happen.

"Both countries have a common obligation to ensure that terrorist elements are firmly dealt with," he added.

Asked whether he would have talks with Pakistan President Pervez Musharraf [Images] at Havana, the prime minister said, "We can choose our friends, not our neighbours. But there should not be any problem in talking."

Referring to the terrorist strikes in Mumbai, Varanasi and Delhi, the prime minister said terrorism and Naxalism posed the greatest threats to the country's internal security.

"We will not relax our vigil and deal with these threats," he said.