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A woman killed by a 550-pound male lion at a conservancy near Fresno, Calif., earlier this week may have been caught by surprise after the animal escaped its cage, investigators say.

According to a preliminary autopsy, Dianna Hanson, a 24-year-old intern for Cat Haven, was killed Wednesday when the lion snapped her neck.

North Korea responded to new U.N. sanctions aimed at starving its nuclear program by vowing to cut a Cold War-style hotline and scrap a nonaggression pact with the South.

State-run media said North Korea "abrogates all agreements on nonaggression reached between the North and the South ... and also notifies the South side that it will immediately cut off the North-South hotline."

There were 236,000 jobs added to payrolls in February — many more than expected — and the jobless rate unexpectedly dropped by two-tenths of a point, to 7.7 percent, the Bureau of Labor Statistics reported Friday.

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