Suspects quizzed over Delhi bombs

More than 400 people have died since late 2005 in bombings at Indian cities

Indian police say they have detained several suspects a day after a series of bomb blasts killed at least 20 people in the capital Delhi.

About 90 people were injured when the five devices went off in busy shopping areas within minutes of each other.

Indian media reported that 10 people were being questioned and police told AP news agency they had "vital clues".

Responsibility for the blasts was claimed by a Muslim militant group in an e-mail sent to Indian media outlets.

More than 400 people have died since late 2005 in bombings at Indian cities.

BOMB ATTACKS IN INDIA IN 2008 13 September: Five bomb blasts kill 18 in Delhi 26 July: At least 22 small bombs kill 49 in Ahmedabad 25 July: Seven bombs go off in Bangalore killing two people 13 May: Seven bomb hit markets and crowded streets in Jaipur killing 63 Delhi bombs follow haunting script In pictures: Delhi blasts

Delhi police spokesman Rajan Bhagat told AP that several people were being held and investigators hoped to solve the case soon.

Four unexploded bombs were also found and defused on Saturday, police said.

Two of the blasts hit Connaught Place - an important financial and commercial centre - while two more hit the upmarket shopping district of Greater Kailash.

'Cowardly'

A fifth ripped through a busy electronics and automobile components market.

An e-mail purportedly from a group calling itself the "Indian Mujahideen" claimed it carried out the attacks, adding: "Do whatever you can. Stop us if you can."

The same group has claimed responsibility for two other recent bomb attacks in Jaipur and Bangalore.

The Mayor of Delhi, Arti Mehra, said the city would not be intimidated by the "cowardly" attacks.

Pakistan's new President, Asif Ali Zardari, joined in official Indian condemnation.

British Justice Minister Jack Straw, in Delhi on an official visit, also condemned the "horrible attacks".

America's ambassador in Delhi, David C Mulford, said the US stood shoulder-to-shoulder with India in the fight against terrorists.