Tue 08 Aug 2003India on alert after at least 46 die in Bombay car bombsIndian authorities have tightened security at entry points and government buildings in the country's commercial capital Bombay, now officially known as Mumbai, after two car bombs killed at least 46 people yesterday.More than 150 people were also injured when the bombs hidden in taxis went off in quick succession in the city's congested bullion market and the nearby plaza in front of the Gateway of India monument, the city's most famous attraction.