The government says that six men who have been arrested are allegedly members of Indian Mujahideen terror group and are responsible for attacks in three cities in 2010.
The men, who include one Pakistani, were arrested from different parts of the country.
Investigators claimed the arrested persons were allegedly involved in the Pune German Bakery blast in February last year in which 17 people were killed; an explosion at Bangalore's Chinnaswamy Stadium during an IPL match in April 2010; and a blast in car outside the Jama Masjid mosque in September last year ahead of the Commonwealth Games.
Police sources said the mastermind of the attacks is named Imran or Yaseen Bhatkal and is missing. A photo released of him today purportedly shows him leaving behind a bag with the bomb that would explode at the German Bakery. (Read Delhi Police on arrests of alleged terrorists)