The United Nations is calling on Armenia and Azerbaijan to respect a Russian-brokered ceasefire, after both sides accused each other of violating the truce with indiscriminate attacks that killed civilians. U.N. Secretary-General António Guterres pointed to an attack Saturday on Azerbaijan’s second-largest city, Ganja, which killed 13 people, including children. Armenia said Azeri forces fired missiles on civilians in Nagorno-Karabakh’s capital city.