Kochi: Kerala Chief Minister Oommen Chandy on Saturday said he had written to his counterpart in Jharkhand asking him to take action against those who were responsible for killing of nun Valsa John from this state.

"Whoever is responsible must be brought before law," Chandy told reporters after visiting relatives of the slain nun at Vazhakkala in Ernakulam district this morning.

52-year-old Valsa, a member of the Sisters of Charity Jesus and Mary congregation since the last 24 years, was hacked to death on November 15 at Pachwara village in Pakur district of Jharkhand.

She was spearheading an anti-displacement movement against a private company in Jharkhand.

Valsa's family had said she had stated that she faced death threats from a coal mining mafia.