A Naxal arrested from the Naxal-hit Giridih district today confessed that the money being extorted by the ultra outfit was being invested in illegal coal mining and money lending business. In the course of investigation, Mannu Baitha has confessed that they are lending money on interest to villagers, apart from investing in illegal coal mining in the district, district Superintendent of Police A B Homkar said. Baitha was arrested alongwith Rs 5.40 lakhs extorted from a contractor of a construction company. Chotelal Yadav, the contractor, was also arrested for 'supporting' the Maoists by paying them money.