Commissioner of Police Shankar Bidari said no comments could be made on the perpetrators of the blasts since investigations are still at a very early stage.

The blasts come on the back of tension in parts of north Bangalore exactly a week ago, following the alleged planting of pig meat in some mosques in the region.

The crude bomb blasts sent a spiral of panic around Bangalore with offices, shops and establishments shutting down early to send employees home — especially along the IT corridor.

“All our employees are safe and there has been no impact on our business operations. We are in touch with the police department to and will remain fully alert. We have increased security on our campus,” Infosys said in an official statement after the blasts.

Chief Minister B S Yeddyurappa, who described the blasts as shocking, said he saw a conspiracy to derail his two-month-old BJP government on account of the good administration provided by it.

“I condemn this cowardly act aimed at disrupting peace and normalcy. Destructive forces whether anti-social or anti-national will be brought to book,” he said.

He appealed for peace and a return to normal life in Bangalore over the weekend. Security would be heightened around the state, he said.