The years from 1990 to 2010 saw an increase in violence and terrorism activities. Following the demolition of the Babri Masjid in Ayodhya, the city was rocked by the Hindu-Muslim riots of 1992–93 in which more than 1,000 people were killed. In March 1993, a series of 13 coordinated bombings at several city landmarks by Islamic extremists and the Bombay underworld resulted in 257 deaths and over 700 injuries. In 2006, 209 people were killed and over 700 injured when seven bombs exploded on the city's commuter trains. In 2008, a series of ten coordinated attacks by armed terrorists for three days resulted in 173 deaths, 308 injuries, and severe damage to several heritage landmarks and prestigious hotels. The three coordinated bomb explosions in July 2011 that occurred at the Opera house, Zaveri Bazaar and Dadar were the latest in the series of terrorist attacks in Mumbai which resulted in 26 deaths and 130 injuries.