A bomb threat has been reported at New York's LaGuardia airport.

Frantic passengers took to Twitter on Saturday morning in confusion to report a large police and military presence at the scene.

None were told what the danger was but were stopped from checking-in or boarding flights. Port Authority closed terminals A and B in the chaos.

By 8.30am, there were unconfirmed reports that a man 'in his 50s' had been arrested.

According to ABC, the incident occurred after the man began arguing with staff at the Spirit Airlines counter.

He reportedly threatened to return with a bomb then came back with a large bag.

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Police at LaGuardia Airport in New York on Saturday morning after a bomb threat sparked evacuations in part of the airport

La Guardia warned that the disruption may cause delays

Passengers tweeted their confusion after seeing a bomb squad arrive on the scene and later, a man be taken away in handcuffs. DailyMail.com understands that the person is currently being interviewed

Other sources said the person was being interviewed but that no arrest had yet been made.

Port Authority could not confirm the claims when speaking to DailyMail.com.

A spokesman said: 'Expect delays at Concourse A & B. NYPD bomb squad on scene, details to follow. There are no injuries.'

The spokesperson added that neither of the terminals were evacuated but that only the screening checkpoints and departures hall before security were affected.

Flights bound for the airport from other cities were also delayed as a result.

One passenger at Chicago's Midway Airport told DailyMail.com she heard staff there describing the incident as a bomb threat.

Neither Port Authority nor LaGuardia Airport staff could provide anymore information.