Police in Nogales threatened by drug smugglers

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PHOENIX (AP) -- Police in the Arizona border city of Nogales have been told to carry guns when they aren't at work after smugglers threatened to retaliate against two off-duty officers who earlier this month stopped a vehicle carrying 400 pounds of marijuana.

Nogales Police Chief Jeff Kirkham said Tuesday that he considers the threat credible because various informants who spoke with investigators were able to identify the specific officers who thwarted the drug load.

Kirkham said the U.S. Border Patrol has sent additional agents to the stretch of desert east of the city where the off-duty officers who were riding horses had stopped the smugglers.

The smugglers left behind their vehicle and fled into Mexico.

No one was injured in the bust.