BOMBAY -- Bombay stocks closed modestly lower Tuesday ahead of a series of explosions that rocked the western Indian city's commuter rail network.The BSE Sensex dropped 70 points to close at 10,614.35. After the market closed, seven explosions hit rush hour trains, the Associated Press reported. Dozens of people were killed or injured, police and Indian media said. Gainers Tuesday were Cipla, up 3.2%; Gujarat Ambuja, up 2.4%, and Satyam Computers ( SAY), up 1.5%. Hero Honda dropped 6%, Tata Motors ( TTM) lost 3.5% and Hindalco gave up 2.5%. Hero Honda's decline came after the motorcycle maker posted a 16.3% rise in its first-quarter profit. Crisil jumped 13% after it reported a 122% rise in its profit for the second-quarter. Panacea Biotec rose 3.51% after it said that it signed an agreement with PT Bio Farma of Indonesia to manufacture and market a measles vaccine.