Rashawn Smith, 20, was arrested in Midway, Georgia and charged with the Dissemination of Information Relating to Terroristic Acts.
"The perpetrator of the attack in Streatham district in south London yesterday is a fighter of Islamic State," a statement carried by Amaq said.
The man was shot by armed officers on a street in Streatham, in London, on Sunday afternoon, the Metropolitan Police said.
The Somalia-based militant group, affiliated with Al-Qaeda, has claimed responsibility for the dawn attack on on Camp Simba in Lamu county, Kenya.
Brian Groner, 27, has been charged with making a terroristic threat three months after he was first charged with the same crime because of statements he allegedly posted about the Columbine massacre.
Indian-born Asim Umar had been the head of al-Qaeda in the Indian Subcontinent (AQIS) since 2014.
Alexanda Kotey, radicalized in West London, was one of four members of the notorious torture cell, infamous for their brutality and British accents.
Iran ultimately "intended to achieve absolute security, defined as the ability to thwart its adversaries' ability to overturn its regime or invade Iran militarily," according to a new report.
"The battle of Baghouz is finished, but it demonstrated the barbarity and savagery of the crusader community towards the Muslim community," ISIS chief Abu Bakr al-Baghdadi appeared to say on tape.
In the 1960s and 70s, the U.S. and U.K. forcibly expelled the population of Diego Garcia, an island now used as a military base thousands of miles off the coasts of Africa and Asia.
President Donald Trump's remarks came as Israel launched airstrikes against the Gaza Strip in response to rockets fired north of Tel Aviv.
ISIS is fighting for its life in a small, collapsing pocket of eastern Syria and it warned Muslims that the mosques massacre in Christchurch would only be the beginning.
Utrecht police said they have detained the main suspect in a shooting that killed three people and injured up to five more on a tram.
The "Morning Joe" host called out Senators Mitch McConnell and Mitt Romney, President Donald Trump and others in an extended monologue.
White House national security adviser John Bolton had warned Ayatollah Ali Khamenei, "I don't think you'll have many more anniversaries left to enjoy."
Egyptian officials said at least two people were killed in the blast.
President Donald Trump is reportedly looking to scale down U.S. involvement in Afghanistan, just as China, India, Iran, Pakistan and Russia are looking to step up peace efforts.
Two leading rival blocs of the Iraqi parliament condemned Trump's visit as a "blatant violation of Iraqi's sovereignty," while Iran-backed militias called for U.S. troops to be ousted.
The visit came one week after President Donald Trump announced the withdrawal of U.S. troops from Syria.
U.K. Security Minister Ben Wallace said he and other officials are kept "awake at night" by the fear of Al-Qaeda staging a new attack on a plane.
"We pose no threat to any country but if the enemies seek to implement their malicious intentions and attack us we will be absolutely aggressive," the Revolutionary Guards ground forces chief said.
Already suffering heavy casualties in their fight against ISIS, the U.S.-backed Kurds are bracing for Turkish attacks "within a few days."
Iraq and Syria both declared victory against ISIS late last year, but the jihadis have maintained a presence in the face of pro-government and U.S.-led airstrikes in the latter.
Israel warned that Hezbollah's alleged cross-border attack tunnels originated from a Lebanese site "that we are going to expose in the very near future."
Moscow's presidential envoy for Syria said Russia "is ready to provide all possible help, including the assistance of the Syrian government forces."
Ukrainian President Petro Poroshenko said that the number of Russia forces at the border had "grown dramatically."
The U.S. military has begun setting up observation posts on the Syrian border with Turkey, as the latter has attacked the Pentagon's Kurdish allies.