June 30, 2014 5:58 pm Cause of Mystery Oil Spill Revealed Officials have determined the cause of a mystery oil spill in Washington Township. NBC10’s Cydney Long has the details. US & World Videos 0:17 Man in critical condition after being shot several times inside a seafood restaurant 0:20 Man in critical condition after being shot inside an apartment building in West Philly 1:52 Police searching for suspects involved in graduation shooting that left a man dead, 3 injured 21:51 NBC10 @Issue: Reclassifying marijuana 0:35 Fans of ‘The Office' got to see some of the stars at Fan Expo Philadelphia on Saturday