The Delhi High Court today issued notice to ex-Army Chief Gen VK Singh among others on a plea of former Defence Intelligence br br Agency head Lt Gen Tejinder Singh against a lower court order asking him to seek sanction to prosecute them in a criminal defamation case.br br Besides the former Army chief, Justice Sunil Gaur also sought responses from then Vice Chief of Army S K Singh, retired Lt Gen D S Thakur (the then DG of Military Intelligence), Major Gen S L Narshiman (ADG of Public Information) and Col Hitten Sawhney.