Calcutta High Court on Thursday started a suo motu case on killings of elephants, bison and birds in north Bengal forests.

A division bench headed by Chief Justice T.B.N. Radhakrishnan observed that such incidents would have to be stopped immediately.

The court directed the registrar general of the court to make principal secretary, forest, chief conservator of forests and all other officers concerned parties to the case.

The forest department was also asked to file a comprehensive report on the killings and the problems it was facing in tackling the issue.

As a few elephants had been electrocuted in the recent past, the bench also directed that the West Bengal State Electricity Distribution Corporation be made a party to the case.