PHILADELPHIA (CBS) —  The Philadelphia Police Department says it has not received any credible threats to the city, but officers have been instructed to make extra safety checks at historical sites, religious institutions and social establishments that could potentially be targeted by terrorists.  There will also be increased patrols at sporting events going on over the weekend.  The public is asked to be extra vigilant and to notify 911 immediately if they see something suspicious. At this hour, the AP reports that Paris Prosecutor Francois Molins says the death toll in the attacks at six sites around the French capital could exceed 120.