Police has detained the fourth Indian Mujahideen (IM) suspect from Mangalore in Karnataka.
The suspect was held based on the information provided by three suspected IM operatives who were arrested on January 8 at Bhatkal and Bengaluru.
A blast outside a restaurant in the busy Church Street on December 28 had led to the death of a woman and injured three others. The blast was triggered by an Improvised Explosive Device.