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The Oregon gunman was a 20-year-old, who died by suicide. On Sunday night, he fired shots inside a grocery store, killing two and injuring two. Investigators are still trying to determine a motive. The carnage may have been worse had an employee not [attempted to disarm] the gunman, police said. A search of the gunman's vehicle found three Molotov cocktails, a sawed-off shotgun, and additional ammunition.
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The deadly shooting was one of [several] in the U.S. over the weekend. In Detroit, three people were killed and a man was injured in a shooting spree early Sunday. Following an hourslong search Sunday, authorities arrested a man believed to be responsible.
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In southwest Houston, authorities fatally shot a man Sunday who set an apartment building ablaze and shot five fleeing tenants, killing three. The gunman had been evicted from the apartment. In Phoenix, a man armed with a semi-automatic rifle fatally shot two people in a seemingly random attack Sunday night. Two officers were among five others injured.