On July 11, 2006, seven powerful bombs ripped through suburban trains, leaving 209 people dead and over 700 injured.

The attack was carried out by the Lashkar-e-Taiba and the banned Students Islamic Movement of India (SIMI). Detailed investigations also pointed at the involvement of the Indian Mujahideen (IM).

Pressure cookers with a 2.5 kg deadly concoction of RDX, ammonium citrate and other chemicals were placed in the first class men's compartments of suburban trains of the Western Railway during the evening peak hours.

The blasts were triggered within 11 minutes at or near Matunga Road, Mahim, Bandra, Khar Road, Jogeshwari, Borivali and Bhayander suburban railway stations, catching commuters returning home from work.