The United States is giving nine airlines until Saturday morning to make sure that passengers on flights from 10 overseas airports aren't carrying any electronic devices larger than smartphones with them.
A senior Trump administration official said the airlines are being given 96 hours to fully implement the rules, starting 3 a.m. ET Tuesday, because "evaluated intelligence indicates that terror groups continue to target aviation, to include smuggling explosives in electronic devices."
Officials wouldn't say how long the restrictions will be in place.
U.S. officials wouldn't be more specific about the intelligence or say how recently it was obtained.
The outlines of the new policy were revealed Monday when Royal Jordanian Airlines "jumped the gun" and sent an advisory to passengers, a U.S. official told NBC News.
Officials said devices like tablets, cameras, laptops, portable DVD players, e-readers, portable printers and scanners, and video games will have to be placed in checked baggage under the new policy, but medical devices will be permitted. The restrictions won't affect crew members.
The policy covers about 50 direct daily flights into the United States from nine airlines flying from 10 overseas airports.
The airlines are:
Saudi Arabia Airlines
Royal Air Maroc
The airports are:
Queen Alia International, Amman, Jordan
Cairo International, Egypt
Ataturk International, Istanbul, Turkey
King Abdulaziz, Jeddah, Saudi Arabia
King Khalid International, Riyadh, Saudi Arabia
Kuwait International, Farwaniya, Kuwait
Mohammed V International, Casablanca, Morocco
Doha International, Qatar
Dubai International, United Arab Emirates
Abu Dhabi International, United Arab Emirates
No U.S. airlines are affected because none operate flights directly to the United States from those airports.
Domestic U.S. flights are also unaffected.
RELATED: The strangest weapons found by the TSA
The strangest weapons found by the TSA
The strangest weapons found by the TSA
Holy purple projectiles, batman! All batarangs, no matter the color, must be packed in your checked bags. This one was discovered in a carry-on bag at Providence (PVD). #zlonk #glurp #blap #vronk #powie
This small knife was discovered in a pill bottle inside a carry-on bag at Jacksonville (JAX). Intentionally concealing a knife (no matter how small) can lead to headaches such as fines and arrest.
#TBT April 2012: Flying fish are found in the ocean, not on commercial aircraft. We hate to be a wet blanket, but spear guns are not allowed in the cabin of an aircraft and must be packed in checked baggage. This spear gun was discovered in a carry-on bag at Raleigh-Durham (RDU).
Holy cow! This cattle prod was discovered in a carry-on bag at the Chicago Midway (MDW) Airport . All shocking devices, especially cattle prods, are not allowed in carry-on bags. Please pack them in your checked bags with the batteries removed.
Which is mightier, the pen or the knife? This pen-knife was discovered in a carry-on bag at San Juan (SJU). Concealed knives can lead to fines and arrest.
We’re pretty sure this isn’t a letter opener. A bladed dragon claw perhaps??? Whatever it is, it should be packed in checked baggage. It was discovered in a carry-on bag at Atlanta (ATL).
Is this some kind of confangled rotisserie contraption for turkeys? Nope. These are Sai. If you’re a #TeenageMutantTurtle fan, you’ll know the Sai as Raphael’s weapon or choice. If you still have no clue, a Sai is a weapon used for striking, bludgeoning and punctures. Whatever it is you use them for, please know they must be packed in checked baggage. These were discovered in a carry-on bag at Boise (BOI). #TheMoreYouKnow
This ornate flask of black powder was discovered in a carry-on bag at Allentown (ABE). While it is a fancy flask, the black powder contained within is an explosive and is strictly prohibited in both carry-on and checked bags.
Packing list: Socks. ✅ Toothbrush. ✅ Curling Iron. ✅ Post-apocalyptic bullet-adorned gas mask. ❌ While gas masks are allowed in carry-on bags, replica bullets are not. This was discovered in a carry-on bag at Miami (MIA). Maybe he was catching a one way flight to #FuryRoad?
#TSATravelTips - Don’t pack your homemade replica suicide vest. The traveler who packed this vest in his checked bag at Richmond (RIC) stated it was a prop intended for use in a live-action role-playing game (LARP). TSA explosives experts raced to the checked baggage room and the airport police were called immediately. Fortunately, the explosives experts determined the vest posed no danger. It has yet to be determined if the officer who searched the bag needed a change of clothing.
While about to receive a pat-down after opting out of body scanner screening, a Chicago O’Hare (ORD) traveler remembered that he had a throwing knife necklace under his shirt. All knives are prohibited and concealed knives can lead to fines and arrest. #TSAGoodCatch
While some travelers are worried about packing nail clippers (they are allowed), others pack a pair of five-bladed floggers. You guessed it; these are not allowed in carry-on bags. If you’re in a situation where you’re going to need your floggers, they’ll have to be packed in checked baggage. These were discovered last week in a carry-on bag at the George Bush Intercontinental Airport in Houston, Texas (IAH). #TSATravelTips
You’ve likely heard that you’re not supposed to bring a knife to a gunfight? Well, you’re not supposed to bring either in your carry-on bag. Both replica weapons and knives are not allowed in carry-on bags. If you find yourself needing to travel with your gun knife, please pack it in your checked bag. This gun knife was discovered in a carry-on bag at the Detroit Metropolitan Airport (DTW).
This 4-bladed throwing star was discovered in a carry-on bag at the San Francisco International Airport (SFO). These must be packed in your checked bags. Sorry Prince Colwyn. #Krull
This belt buckle knife was discovered in a traveler’s carry-on property recently at the Columbia Metropolitan Airport (CAE). Concealed weapons can lead to fines and arrest.
Naruto’s ninja gear was discovered in a carry-on bag at Las Vegas (LAS). Please pack all ninja gear in your checked bags. #TSATravelTips
This knuckle knife was discovered in a carry-on bag at Memphis (MEM). Knives of any size are not allowed in carry-on bags. They must be packed in checked bags. #TSATravelTips
This impaler cane was discovered amongst a traveler’s carry-on property in Baltimore (BWI). These must be packed with checked baggage. Concealed weapons can lead to fines and arrest.
Many things can be hidden in shoes, but explosives are what concern us the most. This shoe is a replica of the bomb Richard Reid attempted to use in 2001 on his flight from Paris to Miami.