Warren, MI — Authorities say a freight train derailment sent more than a dozen rail cars off the tracks Thursday morning near Detroit, snarling traffic while emergency responders assessed the damage. Warren Fire Commissioner Wilburt McAdams says 13 of the CN freight train’s 151 cars derailed about 7:30 a.m. EDT in the city just north of Detroit. No injuries were reported following the derailment on Warren’s southeast side. McAdams says three of the 13 derailed cars were tanker cars hauling liquid chlorine and unrefined alcohol. He says a tanker car carrying alcohol was leaking a little, but did not pose a danger to the public.