ISIS-K, the Afghanistan branch of the Islamic State militant group, is suspected of being behind the explosions in Afghanistan on Thursday.
Two suicide bombers and gunmen were involved in the attack, but evacuation flights from the airport have continued, the official said.
Amid the threats and processing delays for evacuees, the U.S. and its allies have a rapidly closing window to try and help others leave the country.
"Is there a better word for someone who can't leave their house to get to the airport [...]?" Fox News' Peter Doocy asked White House Press Secretary Jen Psaki.
General Eberhard Zorn said that "the threat has further increased," according to American and German intelligence.
"We believe the world has a unique opportunity of rapprochement and coming together to tackle the challenges not only facing us but the entire humanity," the Taliban Cultural Commision's Abdul Qahar Balkhi told Newsweek.
Aircraft entering and departing the airport have begun using measures to avoid missile attacks, such as corkscrew landings and firing flares upon takeoff.
"We are the strongest military on the face of this planet," the Iowa Republican senator said on Sunday.
"The threat is real. It's acute. It is persistent. And it is something we're focused on with every tool in our arsenal," the national security advisor said Sunday.
This latest development comes as the U.S. government attempts to evacuates thousands of Americans and Afghan allies from Afghanistan after it fell to the Taliban last weekend.
"We don't have military in Syria to make sure that we're gonna be protected," the president told ABC News.
The memo comes as the U.S. is set to withdraw all troops in Afghanistan, where ISIS and al Qaeda are rooted, and said parts of West and East Africa were susceptible to terror groups.
Although the Taliban said they would not monopolize power in the region, they insist that a peace deal will not be reached until a new government is negotiated.
"We're glad that they're doing what they're doing," a Defense Department official said of the Taliban fight against ISIS, "because it mirrors and parallels what we're trying to do for our counterterrorism mission."
Gallagher explained that his team also planned to "do medical scenarios" on the detainee "until he died," to prevent ISIS soldiers from torturing him to death.
A Ugandan man detonated explosives in a suicide bombing on Sunday in the eastern town of Beni, a city occupied by both U.N. peacekeepers and the Congolese army in recent years.
"We must step up the action taken by the coalition, increasing the areas in which we can operate," said Italy's Foreign Minister Luigi Di Maio.
As violence in Afghanistan increases amid U.S. and NATO troop withdrawal, the country's Hazara ethnic group are arming themselves against what they anticipate will be a war for control between factions competing for control.
The Biden administration should immediately review whether there is any legitimate basis for continuing to detain Omar Ameen, a resettled Iraqi refugee in the U.S., who has roots and a family with four children in Sacramento, or to continue to push for his deportation.
The suspect allegedly said that if he couldn't join ISIS in the Middle East, he'd commit an attack in the U.S. on the group's behalf.
Russia said the U.S. convoy had taken a route "without prior notice" as friction over deconfliction efforts grows between Washington, D.C., and Moscow.
Rear Admiral Marc Aussedat, the head of a task force that features the Charles de Gaulle nuclear-powered aircraft carrier, said reconnaissance flights are being carried out to help French forces on the ground observe the Islamic State and that weapons will be used if needed.
Tannab Raslan, which was available on the local Asia TV as a special during the Ramadan holy month, followed Iraqi celebrity guests and invited them to a "charity event" that turned out to be a staged ambush by actors playing militants.
Russia's embassy in Washington tweeted that the U.S. presence in Syria was "primarily illegal."
The Afghan president expressed his reservations about the U.S. troop withdrawal
Seth Jones, a senior vice president at the Center for Strategic and International Studies in Washington, D.C., raised concerns about chaos following a post-withdrawal from Afghanistan that ISIS might take the opportunity to seize.
The general said that Iraq needs the U.S. support "to continue the fight against ISIS."