MINNEAPOLIS (WCCO) — The murder rate is down overall in the United States. But violence like the San Bernardino shootings is becoming more common.

San Bernardino Shootings (credit: Frederic J. Brown/AFP/Getty Images)

San Bernardino Shootings (credit: Frederic J. Brown/AFP/Getty Images)

The FBI studied active shootings where gunmen were “actively engaged in killing or attempting to kill people in a confined and populated area.” It found 160 cases between 2000 and 2013.

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There was an average of six active shootings per year in the first half of the study.

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But that number jumped to sixteen per year in the second half. Active shooters killed or wounded more than 1,000 people. Sixty percent of the shootings ended before police could arrive.

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Law enforcement put together a video called “Run, Hide, Fight,” which includes advice for surviving an active shooting. Click here to watch it.