According to a spokesman from the US State Department, the United States has called for an investigation of the trolley bus explosion in Donetsk. In response to the deteriorating situation in Ukraine, NATO is planning to increase its military presence. Secretary General Jens Stoltenberg, said the alliance will increase the presence in the Baltic states, Poland, Romania and Bulgaria. At the same time, NATO has confirmed that the separatists have new military equipment, but remains unable to name the exact number of Russian soldiers currently in Ukraine.