Ukraine's top commander said on Thursday Kyiv had set up a military commandant's office in the occupied part of Russia's Kursk region where he said his forces were still advancing, even as Moscow's troops stepped up its offensives in Ukraine's east. The remarks by Colonel General Oleksandr Syrskyi were the strongest sign yet that Kyiv's forces plan to dig in after launching a lightning cross-border assault on Russia last week that has opened a new front in the 2-1/2 year-old all-out war. "We are moving forward in Kursk region. A military commandant's office has been created which must ensure order...