Islamabad administration on Saturday declared the farmhouse of former President Gen (retd.) Pervez Musharraf a sub-jail.The decision comes a few hours after an anti-terrorism court (ATC) sent the former president to jail on 14-day judicial remand till May 4 in connection with judges’ detention case.According to the administration, this decision was taken due to security concerns. Jail administration will take over the control of Musharraf's house.A deputy superintendent of police (DSP) will be deployed at Musharraf's farmhouse.