NEW DELHI - Thirteen people have been injured in an explosion near an office of India's main opposition Bharatiya Janata Party (BJP) in southern Bangalore city, police said.
Two of the victims suffered serious injuries, Bloomberg news agency quoted the police as saying.
City Police Commissioner Raghavendra Auradkar, seen speaking on local television channels, said the cause of the blast is still being investigated.
Footage showed burned out vehicles as police cordoned off the area and collected evidence, reported Bloomberg.
Commissioner Auradkar was quoted as saying that the blast may have started from a motorcycle, adding that eight of the wounded were police officers.
Bangalore, which is ruled by the BJP, is home to technology companies Wipro Ltd. and Infosys Ltd. Karnataka state, of which Bangalore is the capital, is preparing for elections that will be held on May 5.
India has suffered nine terrorist attacks since November 2008 when the government pledged to improve policing and intelligence gathering after Pakistani gunmen killed 166 people during a three-day siege of the country's financial capital, Mumbai. The latest bombing in Hyderabad in February killed at least 16 people.