earlier, there were st battles as russian troops entered the northeastern city of car keys. lexi o'brien reports, ukraine's biggest city. now the latest front line and the wall with russia. street vessels began after rush and tanks and troops moved into harkey on sunday. some of their hardware destroyed and fierce fighting people have been told not to leave their homes, but not just because of the military advance. ukraine says russian forces blow out this pipeline nearby. people have been warned to keep inside to protect themselves from the toxic smoke b, u, the blast at the pipeline and hockey happened during a wave of russian attacks on airfields and oil and gas facilities. analysts say this is a new phase in the invasion. russia's troops are trying to take over the seal key of air base or an oil depos on fire after being hit by russian missile. the site is 40 kilometers from the capitol, keith, so none of us and q sco her mother. you have seen that during the whole day there were attacks from ballistic missiles including to our apple, which we have contained and now they are continui