NEW DELHI: Expressing “deep concern” at the continuing political violence in West Bengal , the home ministry on Sunday issued an advisory to the state government seeking all necessary measures to maintain law and order and tranquility as well as strict action against state officials found delinquent in discharge of their duty.The advisory comes in the wake of reports of four people being killed on Saturday in post-poll clashes at Bhangipara, Hatgacha in North 24 Parganas district.Earlier too, there have been persistent reports of violence, in which people have lost lives, from various parts of West Bengal.Stating that it was deeply concerned at the violence being reported from the state even after conclusion of Lok Sabha polls, the advisory said: "The unabated violence over the past weeks appears to be a failure on the part of the law enforcement machinery of the state to maintain the rule of law and inspire confidence among people.""It is strongly advised to ensure that all necessary measures are taken to maintain law and order, peace and public tranquility. It is also requested to take strict action against officials found delinquent in discharge of their duty," the MHA advisory told the state authorities.