(NEWSER) – A man and a woman allegedly gunned down two police officers today in a Las Vegas ambush before killing a civilian at a Walmart and taking their own lives, the Las Vegas Review-Journal reports. Details are unclear and the officer deaths haven't been confirmed, but witnesses say the attackers shot the officers having lunch at a pizza place late this morning, after one assailant yelled, "This is the start of a revolution." The shooters then took the officer's guns and ammunition and crossed the street to a Walmart, where witnesses say shots were fired.

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