The Kerala Police on Tuesday arrested a 40-year-old man for allegedly threatening Chief Minister Pinarayi Vijayan over phone, officials said on Tuesday. The accused, Kottayam-native Anil, was apprehended by a team led by Vaikom Deputy SP, while travelling from Thalayolaparambu to Ernakulam on a bus.

"According to our preliminary investigation, the man is mentally unstable. It seems that he noted the phone numbers of the chief minister and other political leaders and government officials from a government diary of a fellow passenger and threatened them over phone," police said. As soon as the call was made to the chief minister's phone, a case was registered at the Cantonment police station in Thiruvananthapuram.