Mystery in the US skies: Concern over unidentified drones

#Pentagon

#AlJazeera English

#FBIInvestigation

Unidentified drones in the sky over New York and New Jersey are causing increasing local alarm. The US Department of Defence has dismissed concerns of foreign involvement.

The Pentagon says there's no threat to public safety.

Al Jazeera's Kristen Saloomey reports from New York, US.

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