Bangalore Police commissioner, Shanker Bidri confirmed seven blasts that rocked the Bangalore city and said that the low intensity crude bombs were triggered by a timer.
Bomb disposal squads have reached the blast sites.
Schools, colleges, cinema halls and commercial complexes have been shut down.
High alert has been sounded to metros and State capitals.
The injured have been admitted to the St Johns Hospital in Bangalore.
State Minister for Home Affairs Shakeel Ahmad said that these blasts are a well - planned act of terror organised by militant organisation but he refrained from naming any particular terrorist outfit.