Inter-Services Intelligence (ISI) Director General Lt Gen Faiz Hamid called on Prime Minister Imran Khan here on Wednesday. According to PM Office, matters pertaining to national security were discussed during the meeting. Meanwhile, Brigadier Mohammad Ahmed has assumed the charge of new Military Secretary to Prime Minister Imran Khan, the PM Office said on Wednesday. The outgoing Military Secretary Brigadier Waseem Iftikhar Cheema paid a farewell call on the Prime Minister in the afternoon. During the call, the prime minister appreciated the services of outgoing Military Secretary and wished him success in his professional career, the PM Office said.