ISLAMABAD — Pakistani television channel Geo News is suing the powerful spy agency for defamation over accusations of being anti-state, it said on Friday, in a move unprecedented in a country where public criticism of the military is taboo. In the latest twist in a saga that has captivated the country, Pakistan's media regulator also suspended Geo for 15 days for reporting that the ISI spy agency was behind the April shooting of one of Pakistan's most famous journalists. “Geo and Jang Group (have) served legal notice on the Ministry of Defense, Inter-Services Intelligence (ISI) and Pakistan Electronic Media Regulatory Authority (PEMRA) for defaming and maligning the group,” the channel said in a report published in a newspaper owned by its parent company. Geo News has also given the ISI 14 days to retract its accusations and issue a public apology. — Reuters