Jammu and Kashmir Director General of Police Dilbag Singh has stressed on maintaining continuous vigil on the activities of those trying to foment trouble in the Valley. He said such elements should be dealt with firmly so that they do not disturb the peace. <br />'' <br />'' The DGP was speaking during a visit to Bijbehera area of Anantnag district where three Lashkar-e-Toiba terrorists were killed yesterday.<br />''  <br />