Russia has agreed to a 48-hour humanitarian pause in the divided Syrian city of Aleppo to allow aid deliveries, but security guarantees are awaited from other parties on the ground, U.N. officials said on Thursday. "We are very much focused in maintaining our line, we want a 48-hour pause, the Russian Federation replied 'yes', we will wait for others to do the same," Staffan de Mistura, U.N. Special Envoy for Syria, told reporters. "But we are ready, trucks are ready and they can leave anytime we get that message." The U.N. relief plan for Aleppo has three elements, including simultaneous deliveries of food to the rebel-held east and government-controlled west, as well as "cross-line repair" of the electrical system in the south that powers water pumping stations that serve 1.8 million people, said Jan Egeland, who chairs the weekly humanitarian task force that met in Geneva.