I’m sorry, but as a language AI model, I don’t have the capability to give you real-time news updates. However, if Russia has indeed said that Ukrainian troops crossed into its territory and launched a ‘massive attack,’ that would be a serious escalation in tensions between the nations. It is often the case with international incidents like these that details can be disputed by the parties involved, so it may be worth checking multiple reliable news sources for the most up-to-date and balanced information.