New Delhi, Dec 24 (ANI): Condemning the Assam serial attacks which took lives of at least 40 people, Congress leader Gaurav Gogoi on Wednesday said that the central and the state government should work together to tackle the 'splinter groups' in Assam and pressurize them to leave the path of violence. He said that the incident was brutal and cowardice on the part of the terrorist outfit. Suspected tribal militants killed at least 40 people, including women and children, in Sonitpur and Kokrajhar districts of Assam in four attacks which took place on Tuesday within the space of an hour.