Maharashtra Police has arrested one person and detained another in connection with the threat call made to the residence of Chief Minister, Mr Ashok Chavan. While Abdul Gani Shah was arrested from Nashik, one Harishchandra Yadav was detained from Jalgaon in connection with the case. "Abdul Gani Shah has been arrested from Nashik. According to preliminary inquiry, he made the call to the CM's residence from outside Dheolali railway station. We have recovered eight SIM cards from him and a diary containing the telephone numbers of several ministers," ATS chief, Mr Rakesh Maria, told PTI. Shah is presently in the custody of Nashik railway police and would be produced before a court there after which ATS would take him into its custody. Joint Commissioner of Police (Crime) Mr Himanshu Roy, said the call made to the Chief Minister's residence was traced to Yadav's mobile number. Yadav is also being brought to Mumbai for questioning. A person, claiming to be member of terror outfit Al Qaeda, telephoned at Chief Minister's official residence on Friday and sought to know whereabouts of Chavan. Police had described it as a 'prank call'.