 Complete the following phrase:  By 2 April 1948, Mazrak and his brother Saad had been interned in Kahil, Abbottabad, in houses no. 3000 and 3259 respectively, under the provisions of Regulation III of 1818. On that day, Ghulam Sarwar, Deputy Commissioner, wrote to the Superintendent of Police letter No. 493830.20, requesting him to keep a close watch on and occasionally report their activities. During the 