WASHINGTON - The United States has called for enhancing cooperation between India and Pakistan in identifying the culprits behind the Nov 26 Mumbai attacks, and also for combating the menace of terrorism. "What's important, and I think we have seen this, is that India and Pakistan are cooperating on trying to find out who actually carried out these attacks in Mumbai," State Department spokesman Robert Wood said Thursday. "The cooperation needs to be enhanced." The spokesman also said he was not aware whether the Indian External Affairs Minister Pranab Mukherjee was on his way here, reportedly with evidence of Pakistan's hand in the Mumbai attacks. "I'm not aware that Foreign Minister Mukherjee is on his way here. I'll take a look and see. I'm not aware of that," Wood said. Stressing the need for stepped up Indo-Pakistan cooperation, the spokesman said, "We've made that point to both sides. And we'll continue to encourage both of them to work not only on trying to find out who the culprits were about this but also to cooperate much more closely on fighting terrorism." Replying to a question, Wood said he was not aware that whether the Vice-President-elect Joseph Biden consulted with the Secretary of State Condoleeza Rice on his current trip to Southwest Asia. "I'd refer you to his office for more details on his trip." Biden is travelling in his role as a US senator from Delaware. He takes office as vice president Jan 20 but has not yet resigned his Senate seat. Biden's trip just days before becoming the vice president was seen as a clear signal that President-elect Barack Obama's new administration plans to make the troubled region an immediate priority. Biden, who is chairman of the Senate Foreign Relations Committee, had planned to travel with senator John Kerry, incoming chairman of the committee, and senators Jack Reed and Susan Collins. Those three bowed out of the group, citing Senate votes scheduled this weekend.