Visiting Afghan President Hamid Karzai said in New Delhi on Saturday he no longer "trusts" the United States, accusing the Americans of saying one thing and doing another in his troubled homeland.

Karzai's statement to journalists came a day after he insisted he would not be "intimidated" into signing a security pact allowing U.S. troops in Afghanistan to stay on after next year.

Having previously lost two babies to diarrhoea and dysentery, 25-year-old Suman Chandel lies on a bed in a clinic in remote northern India and smiles with relief.

Hours earlier, Chandel gave birth to her fourth child, a seemingly healthy baby boy weighing three kilograms (six pounds 10 ounces), and is optimistic that this time the chances of survival are good.

India summoned Friday the U.S. ambassador to New Delhi to protest against the detention of one of its senior diplomats in New York, the foreign ministry said.

"She (Ambassador Nancy Powell) has already been summoned by the Foreign Secretary (Sujatha Singh)," ministry spokesman Syed Akbaruddin told AFP.

Gunmen shot dead a policeman and wounded another on Friday as they headed to Pakistan's northwestern town of Topi to guard an ongoing polio campaign, officials said.

It was the latest in a series of attacks by militants targeting polio teams following the imposition of an official ban by the Taliban last year, who see inoculation campaigns as a cover for espionage.

India has expanded a secretive site that could be used to enrich more uranium for nuclear weapons, a U.S. think tank said Wednesday, citing satellite imagery.

The Institute for Science and International Security, a private group opposed to nuclear proliferation, said that India appeared to be finishing a second gas centrifuge facility at its Rare Materials Plant near the southern city of Mysore.

Suspected Maoist rebels killed seven policemen with a landmine blast in eastern India Tuesday, officials said, the second attack blamed on the insurgents in Bihar state in less than a week.

"Seven policemen died when armed Maoists targeted a security patrol with a landmine," district police chief Upendra Kumar Sharma told Agence France Presse.

Pakistan's outgoing envoy to New Delhi said Monday he saw "light at the end of the tunnel" in diplomatic relations and predicted the improvement would survive next year's Indian elections.

High Commissioner (ambassador) Salman Bashir said calm had returned to the neighbors' de facto border in disputed Kashmir after a deadly flare-up earlier in the year and both sides were committed to improving ties.

Suspected rebels in Indian Kashmir shot dead a police officer and wounded two of his colleagues on Monday outside the main city of Srinagar, an official said.

Unknown gunmen opened fire on the officer who was patrolling a market in Chadoora, 25 kilometers (16 miles) from Srinagar, in an attack that also injured a shopkeeper, the police official said.

Maoist rebels opened fire on a passenger train in the eastern Indian state of Bihar Saturday, killing three railway security men, police said.

The guerrillas fired at the policemen as the train passed through a tunnel on its way to state capital Patna from the town of Sahebganj in Munger district, senior police officer S.K. Bhardwaj told Agence France Presse.

A "very severe" cyclone barreled towards southeast India on Wednesday, forcing the evacuation of thousands of villagers, just a month after a killer storm triggered another massive rescue effort.

Cyclone Lehar, packing sustained winds of up to 120 kilometers an hour (75 miles per hour), was expected to make landfall in the southeastern state of Andhra Pradesh late Thursday, accompanied by waves of up to one meter (three feet), authorities said late Wednesday.