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Two commercial airline flights were grounded in the Northeast late Friday and early Saturday when smoke poured into the cabins on board the planes.

The first flight, a Boeing 777 bound from Dulles International Airport in Virginia to Germany, was in the air when passengers reported smoke smells in the cabin of the United flight, according to airline spokesman, Rahsaan Johnson.

The flight did not make it very far before smoke began filling the cabin, forcing the pilot to divert to Newark, N.J., and land about 11:30 p.m. Friday, Johnson said.

The 210 passengers were set up in hotel rooms and some of the crew requested to be examined for smoke inhalation, but no one was injured, Johnson said.

The Germany-bound passengers were rescheduled on a Saturday flight, Johnson said.

Delta Flight 987 sits at the gate at Philadelphia International Airport on Saturday. The plane was evacuated after smoke was found inside the cockpit shortly before takeoff.NBC10

Meanwhile, a Boeing 737-800 jet scheduled to fly from Philadelphia to Salt Lake City never made it off the ground Saturday morning, after the pilot detected smoke in the cockpit, according to Victoria Lupica, a Philadelphia International Airport spokeswoman.

The smoke on the Delta flight dissipated quickly and was not the result of a fire, Lupica said.

The pilot returned to the gate, the 150 passengers deplaned and no one was hurt, said Delta airline spokesman Paul Skrbec.

Passengers of the Delta flight also were rescheduled on a later flight.

In other aviation news, Justin Bieber’s private plane was detained upon arrival Friday at Teterboro, N.J., when local agents searched the pop star's plane for marijuana. Bieber’s plane, which arrived from Toronto, showed no signs of contraband, law enforcement officials said.