Swedish activist Greta Thunberg was arrested by UK police under the Terrorism Act at the Prisoners for Palestine lock-on protest outside the offices of Aspen Insurance in London, which insures the Israeli weapons firm Elbit Systems. | Al Jazeera English

Leaders from Mali, Niger and Burkina Faso are hoping to find a way to repel advancing fighters linked to al-Qaeda. Al Jazeera’s Laura Khan explains what’s at stake at an Alliance of Sahel States summit in Bamako. | Al Jazeera English

Videos show deserts and mountains blanketed with snow in Saudi Arabia’s Hail and Tabuk region, as a cold weather snap hits several cities. | Al Jazeera English