Montreal, QC, Jul 14, 2010 — Emergency response teams continue to clean up a fuel spill in a canal of the St. Lawrence River near Montreal. A Canadian ship leaked at least 50 tons of bunker fuel when it ran aground Monday night. Environment officials say they believe most of the oil has been contained. But it's unclear exactly how much leaked into the waterway. It's the second time in as many weeks a ship has run aground on the St. Lawrence Seaway. David Sommerstein reports.