The number of people killed in extremist attacks declined for the second successive year in 2016 but more countries were affected, according to the Global Terrorism Index (GTI) released Wednesday.
Donald Trump had earlier said he was considering sending Sayfullo Saipov, 29, to the military's notorious Guantanamo Bay detention centre, but backed off the idea in a blast of early morning tweets calling for the death penalty.
Rex Tillerson spoke as he welcomed Belgium's Foreign Minister Didier Reynders to the State Department, and officials confirmed that a Belgian woman was among those killed in the assault.
"The upcoming office would further enhance the foundations of common understanding to face the challenges facing the region," Staff Lieutenant Colonel Nawaf bin Mubarak bin Saif al-Thani said.
US political analyst Giorgio Cafiero said Washington is coming to terms with its limited capacity to push the involved parties toward a settlement for the conflict that began nearly five months ago.
Indonesian authorities arrested nine men suspected of having links to a militant network loyal to Islamic State and planning a series of attacks on police posts, said a police spokesman.
London police said on Saturday a number of pedestrians had been injured near the city's Natural History Museum and that a man had been detained at the scene ...
Christine Riviere, 51, dubbed by investigators as "Jihadi Gran", was arrested in 2014 after three trips to Syria, which she said were aimed at spending time with her son in case he was killed.
Dr Yousuf al-Siddiqi was speaking at a seminar on “The accusations against Qatar of supporting terrorism” to address the issue of terrorism from an academic, legal and political perspective.
The head of the US Senate Intelligence Committee said Wednesday there was no apparent "terrorism nexus" in the mass shooting that killed 58 people in Las Vegas.