Officer killed after gunman opens fire at Boulder, Colorado, grocery store
[Breaking news update, published at 8:49 p.m. ET] One law enforcement officer was killed in the shooting at the King Soopers supermarket in Boulder, Colorado, two law enforcement sources told CNN. One senior law enforcement source also says the weapon used in the shooting was an AR-15-style rifle. [Previous story, published at 7:52 p.m. ET]
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