The outlawed Indian Mujahideen (IM) is suspected to be behind today's attack on a tourist vehicle near the Jama Masjid in New Delhi and it has warned of terror strikes during the Commonwealth Games in the capital next month.

The modus operandi in the firing, which left two Taiwanese tourists injured, carries the signature of Indian Mujahideen, home ministry sources said.

An e-mail sent in the name of the group to BBC and several other media organisations said, "In the name of Allah, the attack is a tribute to Atif Amin and Mohammed Sajid".

Amin and Sajid were Indian Mujaheedin operatives killed by the police in the Batla House encounter soon after the Delhi serial blasts of September 2008.

"We are warning you. If you have the guts, then organise the Commonwealth Games... We know that preparations are on full swing. Be prepared... We are also making preparations... The participants in the Games will be responsible for the outcome," the e-mail said.

The statement by the IM also denounced the killings of civilians in the Kashmir Valley.

When contacted, a senior Delhi police officer said they were not aware of the IM claim.

Believed to be a shadow amalgam of the SIMI and Lashkar-e-Taiba, the Indian Mujahideen has been declared a terrorist organisation by the government and has claimed responsibility for several terror attacks in the country including blasts in Delhi, Jaipur, Bangalore, Ahmedabad and Pune.