The restrictions, which apply to laptops, tablets, DVD players and phones over a certain size, follow a similar U.S. ban affecting eight countries.
The TSA order, which does not have a stated end date, covers laptops, tablets, e-readers, cameras, portable DVD players, and handheld gaming devices larger than a smartphone.
The six countries included in the ban are Turkey, Lebanon, Egypt, Saudi Arabia, Jordan, and Tunisia.
The airports are in Amman, Jordan; Cairo; Kuwait City, Kuwait; Doha, Qatar; Dubai and Abu Dhabi, both in United Arab Emirates; Istanbul; Casablanca, Morocco; Riyadh and Jeddah, Saudi Arabia.
The nine airlines affected by the US ban were notified of the procedures by the Transportation Security Administration at 3 a.m. ET Tuesday and must comply within 96 hours.
What likely happened is that the USA government developed some intelligence that a group or an individual has developed some type of device that they can carry-on to an airplane using a laptop or some other electronic device.More news: Trump ICE Raids: Immigrants Rushing To Remove Tattoos, California Clinic Says
This means passengers flying through Qatar and the UAE have escaped the new requirements if they're heading to London or other United Kingdom cities.
Prime Minister Theresa May is privy to the same information and intelligence as US officials, a Downing Street source told CNN. The tweet from Royal Jordanian Airlines was taken down Monday afternoon - apparently the airline jumped the gun on the announcement - but the information is correct and apparently the result of a terrorism concern. The U.S. ban will be in place by the weekend, though some airlines are following it immediately.
"However, if we receive any advisory, we will act accordingly", the Air India official said.
While the ban is not a public regulation, airlines in the affected countries that fly directly to the US are expected to enforce the ban and and ensure their passengers comply.
U.K. Prime Minister Theresa May and the USA have in recent weeks discussed intelligence reports about intensifying terrorist threats to aviation, according to CNN.
British Prime Minister Theresa May chaired a number of meetings on aviation security over the last few weeks, including this morning, where the new aviation security measures were agreed. The officials said no US-based airlines have non-stop flights from those cities to the States.