To deal with the closure the Federal Aviation Administration said that traffic destined for the airport was intentionally delayed at its departure point.
People at the airport tweeted that a plane was on the tarmac with emergency vehicles and photos showed the plane's slide was deployed.
Newark Airport shut down all incoming and outgoing flights this morning, according to the airport's Twitter feed.
It remains unclear at this time why EWR was shutdown.
It was traveling toward Houston when it experienced "hydraulics problems" and was forced to make the emergency landing at Newark, Port Authority said in a statement.
Don’t meddle in the election, Trump warns Putin jokingly
Russian Federation is under punitive sanctions imposed by the United States and the European Union and wants them lifted. The finding lifted a cloud over the White House even as tensions have increased between Washington and Moscow.
There were no arrivals or departures at the airport for about an hour, starting around 8:45 a.m.
"All I know is that 10 minutes after takeoff we weren't getting much altitude, we were just circling around northern New Jersey and not going anywhere", he said.
United couldn't immediately be reached for comment. He said was looking into getting another flight.
Planes that were to arrive at Newark were being diverted.
All passengers eventually were taken to a terminal, Murray said.