United passengers heading to Newark ended up in Dublin after a mid-Atlantic medical issue

A United Airlines Boeing 777.

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• A United Airlines flight from Amsterdam to Newark diverted to Dublin.
• The airline told Business Insider it was due to a "health concern."
• One aviation outlet reported that one of the pilots had chest pains.

A transatlantic United Airlines flight had to divert to Dublin due to a medical emergency.

The Boeing 777 was flying from Amsterdam to Newark Liberty International Airport on Tuesday.