UPDATE, 5:45pm: The New York Daily News reports that the plane was chock full of "burly men" en route to the 2012 International Security Conference, some of whom tackled the captain.
An off-duty JetBlue pilot helped land the plane, the paper also stated. As of 4:32pm, passengers were still at the airport in Amarillo awaiting the arrival of another aircraft, according to USA Today.
USA Today also reports that the FAA requires commercial pilots to be medically certified every year if they are under 40 years of age and every six months if they are over 40.
UPDATE, 3:42pm: In a statement to The Huffington Post, JetBlue says that "customers have safely deplaned."
UPDATE, 3:06pm: Following conflicting reports, it appears that the man who caused the ruckus was reportedly the captain of the flight. In a statement (see below), JetBlue said that "the pilot in command elected to divert to Amarillo, TX for a medical situation involving the Captain."
PREVIOUSLY: A JetBlue flight from New York to Las Vegas was diverted to Amarillo, Texas, Tuesday morning after a man tried to storm the cockpit. There are conflicting reports on whether he was a passenger or a captain on the fight.
The Amarillo Globe News reports that JetBlue flight 191 flight was diverted to Rick Husband Amarillo International Airport because of a "medical situation with the captain." Another pilot, who was off-duty but on the plane, entered the flight deck and took over duties of the ill crew member, the paper reported.
Yet MyFoxNy.com reports that a man told passengers to "say their prayers" and tried to storm the cockpit. A source told the site that a "guy wearing a pilot's uniform [was running down] the aisle screaming and yelling and banging on the cockpit door to let him in." It took four passengers, including a retired cop, to stop him.
Likewise, CBS in Dallas reports that roughly two hours into the flight, a co-pilot left the cockpit to use the restroom. At this time, a flight attendant approached a male passenger who was in a partial pilot uniform. That man then entered the cockpit. The pilot who was in the bathroom "exhibited odd behavior, randomly striking up conversations with passengers on his way back to the cockpit. When he realized he was locked out, a passenger says the pilot began screaming 'let me in.'"
As the pilot started acting out, a flight attendant told passengers to "restrain him" over the plane's intercom. One passenger told the station, "He picked the wrong plane. Huge guys just tackled him. The response was Olympics kind of stuff."
A federal government official told CBS that the captain became incoherent, which caused the co-pilot convince him to leave the cockpit. He then locked him out.
ABC News reports that a passenger on the plane told the network that the plane's co-pilot was in the bathroom "for a while" and the pilot in the cockpit locked the flight door. The pilot then went to the cockpit and started "pounding on the door."
A reporter on the scene for CBS in Dallas, told the site that there was an arrest made and there were "a bunch of cop cars" on the scene.
JetBlue told the Amarillo Globe News that the plane landed "due to a medical situation involving the captain." The FBI in Dallas is investigating.
Connect Amarillo reports a passenger said the pilot was "foaming at the mouth".
Connect Amarillo received the following statement from JetBlue:
Flight 191 departed New York's JFK airport at 7:28 am ET (was scheduled to depart 6:55 am ET). At roughly 10 am CT/11 am ET, the pilot in command elected to divert to Amarillo, TX for a medical situation involving the Captain. Another Captain, traveling off duty, entered the flight deck prior to landing at Amarillo, and took over the duties of the ill Crewmember once on the ground. The aircraft arrived Amarillo at 10:11 am CT, and the crewmember was removed from the aircraft and taken to a local medical facility. Customers remain on board at this time. JetBlue is working with local authorities and airport officials for the safe deplaning of the aircraft. JetBlue will send a new aircraft to continue the flight to LAS.
This is a developing story. More to come.
Check out raw videos from passengers above and below.