Six people fainted on board a British Airways flight from Newark Liberty Airport to London's Heathrow Saturday, prompting emergency crews to check the plane for hazardous materials.

Police said nothing suspicious was found on board after the jet was searched by emergency teams in protective gear.

Ambulance personnel said the six people were treated on board the plane and allowed to continue travel. No one required hospitalization, they said.

The plane landed at Heathrow's Terminal Five shortly after 6 a.m. and was boarded by emergency teams, including fire brigades, that had been notified about the unusual onboard illnesses.

British Airways officials said the medical teams were called as a precaution. Officials said the cause of the fainting has not been determined.

The Boeing 777 aircraft carried 216 passengers and 14 crew.