AHMADABAD, India (AP) – At least 29 people were killed and 88 wounded when a series of small explosions hit the western Indian city of Ahmadabad on Saturday, a top official said, a day after seven similar blasts struck a southern city.

Narendra Modi, the chief minister of Gujarat state where Ahmadabad is located, said at least 16 bombs went off Saturday evening in several neighborhoods of the busy city.

Modi called the blasts “a crime against humanity,” and said the state government would cover the medical costs of all those wounded in the attacks.

There was no immediate claim of responsibility for either set of blasts, and it was not clear if they were connected but Modi said that the attacks appeared to be masterminded by a group or groups who “are using a similar modus operandi all over the country.”

Prithviraj Chavan, a junior minister in the prime minister’s office, called the explosions “deplorable” and said they were set off by people “bent upon creating a communal divide in the country” – language officials usually use when blaming Islamic militants believed to be behind bombings that have repeatedly hit India’s cities in recent years.

The latest attacks came a day after seven synchronized small bombs shook Bangalore, India’s high-tech hub, killing two people and wounding at least five others.