Security forces in India remain on high alert, as Hindus in the country celebrate a major festival in the wake of Saturday's bomb attacks in New Delhi that killed nearly 60 people and wounded more than 150.
Hindus are marking Diwali -- the festival of lights -- on Tuesday.
India's Prime Minister Manmohan Singh told Pakistan Monday that the New Delhi bombings were probably linked to foreign elements. Mr. Singh spoke by telephone with Pakistan's President Pervez Musharraf, who called to express his condolences over the blasts.
Mr. Singh said he urged the Pakistani leader to act against terrorism directed at India.
The New Delhi attacks were claimed by the little-known Islamic Revolutionary Front. Indian officials say the group has ties to the Kashmiri separatist group, Laskhar-e-Toiba, which is outlawed in Pakistan.
Pakistani officials say they have no evidence that Pakistani groups were involved in the attack.