It is NOT that close to Norman and don't understand why Norman would be mentioned when talking about Choctaw. Midwest City yes but not Norman. The police could not find burn marks or anything else except neighbors saying they heard a loud explosion and smelled gun powder when they went outside.
Apparently on an OU Fan Message Board the original poster posted a the thread saying he lived about 1 mile west of I-35 and heard a loud explosion. He wanted to know if anyone else heard, or knew of anything. Follow-up reports from KOCO Ch. 5 news related by other posters stated the explosion occurred in Choctaw. As of this time I'm unable to find reports of this in the local media.