NEW DELHI — Two bombs on Thursday killed at least 13 people and wounded about 70 in a busy shopping district in the southern city of Hyderabad at the height of the evening rush hour, the largest terrorist bombing in India since September 2011.

Sushil Kumar Shinde, India’s home affairs minister, said the central government had warned state governments that such an attack was planned. “We have had some information for the last two days of such an incident,” he said.

Hyderabad, one of India’s largest cities and a leading center of the country’s growing pharmaceutical and biotechnology industries, has faced other such attacks in recent years, usually linked to sectarian friction.

The sites of the blasts — in the Dilsukhnagar neighborhood, packed with shops, restaurants, theaters and a huge produce market — were quickly mobbed by protesters, reporters, curious onlookers, and politicians and their entourages. Video on television news in the hours after the bombings showed chaotic scenes, with some investigators trying to find the remains of the explosive devices, which were planted on bicycles, while huge numbers of people jostled for space around them.