' explosives inside Manchester 's sprawling Trafford centre , sending 800 ' victims ' running for cover . A major police operation is ongoing in Munich , around the city 's Olympic Park , with the force warning people to stay in their homes and avoid public spaces as they admitted they do n't know where the gunmen Police officers respond to a shooting at the Olympia Einkaufzentrum ( OEZ ) at July 22 , 2016 in Munich , Germany
But no sooner was the agreement announced than it began to fray — first because of the accidental bombing of Syrian troops by the American - led coalition and then because of what the United States claimed was a deliberate bombing by Russian aircraft and Syrian helicopters of a humanitarian convoy headed to Aleppo . Video In recent days , Russian and Syrian aircraft have carried out attacks , mainly in Aleppo , using bunker - busting bombs , incendiary munitions , cluster bombs , barrel bombs and thermobaric bombs , which scatter a cloud of explosive particles before detonatingconflict.attack.nain devastating blasts , according to American intelligence officials . About 275,000 civilians are trapped in those areas , including an estimated 100,000 children . Hundreds of people have been killed in the past week , international aid groups say .