In a bid to evolve a joint strategy to bring perpetrators of the Mumbai terror strikes to justice, top US and Indian officials on Tuesday asked Pakistan to extend cooperation in investigating the 26/11 attacks.

FBI Director Robert Mueller, who arrived in the capital on Tuesday afternoon, held a series of meetings with Union Home Minister P Chidambaram and Intelligence Bureau Chief Rajiv Mathur among others.

During the meeting, the FBI and IB top brass shared the evidence available including the actual names of Lashker-e-Taiba terrorists like Abu Al Qama, Zarar Shah and 17 other people by the common name of Abu mentioned in the charge sheet filed by Mumbai police last month, official sources said.

FBI conveyed the hardships being faced by its team in Pakistan for questioning the wanted Lashker terrorists who were directing the LeT militants through Voice over Internet Protocol (VoIP) on November 26 strikes which carried for 69 hours and left 183 people dead, they said.

Both sides agreed that Pakistan should cooperate and hand over the wanted terrorists for questioning to unravel the wider ramification of the global terror network, they said.

Emerging after his meeting with NSA M K Narayanan, the last on his itinerary, Mueller said "we have discussed terrorism around the world particularly the Mumbai attacks... each of us has the intent to ensure all those responsible are brought to justice."

Referring to the attack on the Sri Lankan cricket team in Pakistan, Mueller, who himself is likely to travel to Pakistan on Wednesday, said terrorism was not a local issue but one across the world.

"It is an issue across the world and to be successful we have to work together, share intelligence, utilise our various judicial systems to bring to justice those responsible for attacks," he said.

The FBI chief said his organisation was prepared to work with its counterparts around the world.

"We will continue to work with our counterparts around the world to make sure that not only we bring these persons to justice but we also prevent further attacks," he said.