Kerala, Jan 03 (ANI): Maoists in Kerala ransacked and set ablaze a stone crusher unit. State Home Minister, Ramesh Chennithala, said the attack took place in the wee hours in Kannur district. Communist Party of India (Maoist) claimed responsibility for the attack through posters pasted at the office premises. The rebels also destroyed the office phone, fax machine, computer, CCTV cameras and window glasses before burning important government documents. The attack comes days after Chennithala's two-day visit to tribals belts in Wayanad district. The rebels have operated for decades across a wide swath of central and eastern India, and grew in strength during recent times in areas where poor, tribal villagers came into conflict with mining companies seeking resources for industrialisation.