Police sources claimed that underworld activities have increased in and around city in recent days. Senior crime and investigative journalist J Dey murder and attack on Dawood Ibrahim's brother were two of the prominent instances of such activities.
Citing all these evidences, many claimed that serial explosions in Mumbai might have been executed by the underworld and financed by someone else which can be terror group. Police also claimed that without the support from local people, outsiders can not plot such "ghastly planned blasts" in Mumbai.
However, soon after the blasts, police commissioner in Mumbai said Indian Mujaheedin is suspected (IM) as the main culprit. Police sources also informed that IM has been found working closely with Lashkar-e-Toiba (LeT) in the region near Mumbai and the coastal area.
Three back-to-back blasts at Dadar, Zaveri Bazar and Opera House killed at least 21 people and injured more than 141. Home Minister P Chidambaram and Maharashtra Chief Minister Prithviraj Chavan visited the blasts areas in Mumbai at the wee hours of Thursday.
Recently, Intelligence Bureau (IB) alerted all metro cities like Mumbai, Delhi, Kolkata, Bangalore and Hyderabad about the possible terror attacks. All Mumbaikars have been requested to stay calm and not to panic over the ultra attacks. Red alert has been issued in all cities.