Guess who?

India PM Singh: 'Some leads' on Delhi bomb attack

Investigators have some leads on Wednesday's bomb attack outside the high court in the Indian capital, Delhi, PM Manmohan Singh has said.

But Mr Singh said it was "too early to say" which group was behind the attack, which killed 12 people and injured 76.

Investigators said they were taking seriously an email claim by the radical group Harkat-ul Jihad al-Islami (Huji) that it planted the bomb.

The US state department says Huji is a terrorist group with links to al-Qaeda.

The group has been accused of carrying out attacks in India, Pakistan and Bangladesh.

The leader of Huji, Ilyas Kashmiri, was reportedly killed in a US drone strike in north-western Pakistan in June.

The email reportedly demands that a man sentenced to death for involvement in an attack on the Indian parliament 10 years ago should not be hanged.

Mr Singh visited a hospital in Delhi, where the injured have been admitted, on Wednesday night.

"There are weaknesses in our security system and terrorists are taking advantage of them. We have to overcome these. It is a war we must and we will win," he said.

Meanwhile, a 20-member team of the federal National Investigation Agency has begun an investigation into the attack.

Forensic scientists have collected debris for analysis. Police have issued sketches of two suspects.

The bomb was apparently placed in a case near the first security checkpoint at the court, where people were queuing for passes, officials said.

There have been unconfirmed reports in the Indian media that the police are looking for a car which was reportedly spotted near the blast site shortly before the explosion.

The blast at the high court was the second to target the building in five months and came despite a high alert across the city.

Correspondents say it has renewed doubts about India's ability to protect even its most important institutions, despite a security overhaul that followed devastating attacks by gunmen in Mumbai (Bombay) in 2008.