Pilots operating in restricted zones risk being intercepted and detained by law enforcement, aviation authorities say.

The US government says the flying objects pose no threat to national security, but their origin and intentions remain unclear.

Those receiving drones for Christmas are being warned to check the rules before they fly.

There is "no sense of danger" after a puzzling flurry of sightings on the east coast, the president says.

BBC Verify looks at claims about the involvement of aliens or foreign state actors in the alleged drone sightings.

One sheriff said he wanted answers so "people could go about their life and not live in this hysteria".

US officials have said there is no evidence the drones pose a national security or public safety threat.

The state governor has asked for more federal support as questions grow over objects spotted in the skies.