MUMBAI, July 16: Indian Prime Minister Manmohan Singh said on Sunday that Pakistan must prevent militants from launching attacks across the border.

“There has to be a firm commitment that Pakistani territory is not used to support terrorist acts directed against our country,” Mr Singh said aboard his private plane as he headed to the Group of Eight summit in Saint Petersburg.

“But the commitment has to be backed by action on the ground,” he told reporters travelling with him, according to the Press Trust of India news agency.

In a statement earlier in the day, Mr Singh said: “We will impress upon the (G8) leaders ... that the international community must adopt an approach of zero tolerance towards terrorism anywhere.”

Islamabad immediately denied the Indian premier’s claim, with foreign ministry spokeswoman Tasnim Aslam telling AFP: “Pakistan does not allow its territory for any terrorist activity.”

Mr Singh’s remarks came as Indian police said they had identified two suspects wanted for Tuesday’s train bombings in Mumbai in which 181 people were killed.

Officers declined to give names or details about those they were looking for amid growing complaints over the failure to make any arrests five days after the blasts, which left 900 people injured. “We have a couple of suspects. We’re not giving their names,” additional commissioner of police Jayjit Singh, told AFP.