Some attacks have also been blamed on Lashkar-e-Toiba, which India says is backed by Pakistan's intelligence agency the ISI.

BBC: Mumbai attacks show tactic change

"I personally feel the same Lashkar-e-Toiba group is involved in this, " he said.

BBC: India presses Pakistan on blasts

In particular, hundreds of young men joined the Lashkar-e-Toiba and the Jaish-e-Mohammad groups to fight Indian forces in Kashmir.

BBC: Hunting Mumbai militant's roots

They belonged to the dominant Lashkar-e-Toiba Muslim separatist group, which has staged attacks on Indian military installations in Kashmir this year.

BBC: Militants killed in Kashmir

Bombay Police Commissioner R S Sharma said he believed that Lashkar-e-Toiba, a Pakistan-based Islamist militant group, was responsible for the two explosions.

BBC: India presses Pakistan on blasts

The ATS believes the two sets of bombings were carried out by the same group, linked to the Pakistani-based militant group, Lashkar-e-Toiba (LeT).

BBC: NEWS | South Asia | Mumbai marks a grim anniversary

India has blamed Pakistan-based banned group Lashkar-e-Toiba for the attacks.

BBC: India admits 'lapses' over Mumbai

India has blamed a Pakistan-backed militant group, Lashkar-e Toiba, for the killings - a claim the group denies.

BBC: News Online

"Frankly, there is no closure until we get Hafiz Saeed, " referring to the head of Jamaat-ud-Dawa, a Pakistani charity and alleged front organisation for militant group Lashkar-e Toiba, which accused of masterminding the attacks.

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