Seven bombs hit Bombay’s commuter rail network during rush hour Tuesday evening, killing at least 131 people and wounding more than 300 in what authorities called a well-coordinated attack. India’s major cities were put on high alert after the blasts, and Prime Minister Manmohan Singh called an emergency Cabinet meeting.

Chaos engulfed the crowded rail network in India’s financial capital following the blasts that ripped apart train compartments as authorities struggled to treat the wounded amid heavy monsoon downpours. Doors and windows were blown off the train cars, and luggage and debris were strewn across the tracks.

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The Press Trust of India, citing railway officials, said all the blasts had hit first-class cars.

Pranay Prabhakar, the spokesman for the Western Railway, said all train service had been suspended and appealed to the public to stay away from stations in the city.

The bombings in Bombay came hours after a series of grenade attacks by Islamic extremists killed eight people in the main city of India’s part of Kashmir.