Preliminary investigations into Monday night's blast in a BEST bus in Ghatkopar in northern Mumbai have pointed towards a lesser known terrorist group -- Al-Hadees.

The blast left four persons dead and over 30 injured.

Recent bomb blasts in Mumbai:
Ghatkopar blast | Vile Parle blast | Mulund blast

Speaking to reporters in Mumbai, Deputy Chief Minister Chhagan Bhujbal said: "We think it is a new group of Lashkar-e-Tayiba. Within a few days, the culprits will be tracked down.

Referring to the demand for his resignation by the Opposition, Bhujbal said:  "If it [the resignation] could help in stopping the blasts, I am ready to do so. But I also want to mention that those unable to check the blasts in Jammu and Kashmir should also step down."

When asked about tomorrow's Mumbai bandh called by the Shiv Sena and the Bharatiya Janata Party, Bhujbal said:  "I only want to say, we should not be indulging in politics at a time when all people have to come together to face the enemies of the country."

List of Injured

Perpetrators will be punished: Shinde

Chaos, anger at Rajawadi Hospital

Chronology of bomb blasts in Mumbai since Dec 2002