The chief minister, in a meeting with the police top brass, made it clear that criminal activities would not be tolerated.
"Nitish Kumar questioned Bihar Police chief PK Thakur and other top officials about the spurt in crime and the failure of the police to arrest the criminals behind such crimes during a review meeting of the home department and the law and order situation here," the official said.
"He has directed the officials to take action against organised gang of criminals and take necessary measures for it."
According to officials close to him, Nitish Kumar was upset over the reports of growing crime, including killing of two engineers in Darbhanga district last Saturday.
Opposition Bharatiya Janata Party (BJP) has targeted Nitish Kumar over deteriorating the law and order situation and termed it an example of return of "jungle raj" in Bihar.