Original sentence: This led to revival of the  Ram Janma Bhumi -  Babari Masjid dispute which was lying in cold storage for about forty years which in turn led to bringing down of the Babari Masjid on 6 December 1992 and thereby causing bloody riots all over India and over dozen powerful bomb blasts in Mumbai   ( Bombay ) on 12 March 1993 in which hundreds of people mainly Hindus were killed and/or maimed
Edited sentence: This led to revival of the  Ram Janma Bhumi -  Babari Masjid dispute which was lying in cold storage for about forty years which in turn led to bringing down of the Babari Masjid by Hindu fundamentalists (kar sevaks) on 6 December 1992 and thereby causing bloody riots all over India and over dozen powerful bomb blasts in Mumbai   ( Bombay ) on 12 March 1993 in which hundreds of people from both communities were killed and/or maimed