more including our colleague natasha bertrand. there are chechnyian fighters operating inside of ukraine. even on the ukrainian side, there are foreign fighters coming in to help. volodymyr zelenskyy said 16,000 people have volunteered to fight on their behalf. we are at this moment watching a potential internationalization of this conflict that would have a very unpredictable outcome. difficult to say what that's going to mean. >> katie bo, appreciate it. new video just into cnn. according to ukraine's ministry of foreign affairs, this is a fire, two of them, at oil depots. the country's state emergency region says these were caused by russian airstrikes. let me show you where this is on the map. roughly due west of kyiv. it's right there.