With the fresh incident, 25 accused have been gunned down and 39 injured in police encounters in the state under the Himanta Biswa Sarma government.
Special Director General of Police (Law and Order) Gyanendra Pratap Singh said sleuths in Guwahati had to open fire on one accused in self-defence when he tried to flee custody.
The dacoit, who was the prime accused in several cases, was nabbed in Kharupetia in Dalgaon police station area.
Senior police officials in Bongaigaon said that the alleged supari smuggler was nabbed in Golaghat and was brought to Bongaigaon on Monday.
The Assam Police has refuted this allegation, claiming that it was the militants and criminals who forced its personnel to resort to firing.