July 3, 2015 4:57 pm Local Police on High Alert Amid ISIS Threats Police across the Delaware Valley are on high alert this holiday weekend with ISIS calling for attacks. NBC10 Investigative Reporter Mitch Blacher has more on the specific motives for an ISIS attack. US & World Videos 1:25 Residents in Montgomery County warned of possible fraud after mail stolen from collection boxes 2:09 ‘It feels like a slap in the face': Father responds to reinstatement of officer accused of killing son 1:41 11-year-old cancer patient receives floods of motivating letters from strangers near and far 1:43 An Ocean City boardwalk hotspot continues to delay reopening after a series of hold-ups 0:53 One of Philly's most popular cheesesteak spots is set to reopen Wednesday