In Syria, heavy fighting has resumed in Aleppo, after a three-day ceasefire ended with the United Nations saying it was unable to evacuate any of the besieged city’s sick and wounded. Russia and Syria announced the “humanitarian” pause last week, but U.N. humanitarian affairs spokesperson Jens Laerke said aid workers were unable to reach those in need.

Jens Laerke: “Medical evacuations of sick and injured people could unfortunately not begin this morning in East Aleppo as planned, because the necessary conditions were not in place to ensure safe, secure and voluntary evacuation of sick and critically wounded people and their families.”

Russian and Syrian officials said rebels prevented civilians from leaving Aleppo during the break in fighting, accusing them of taking human shields.