NYT reporting Zelensky has declared martial law.

https://www.nytimes.com/live/2022/02/23/world/russia-ukraine-putin

CNN has witnessed, through a livestream video, troops atop a column of military vehicles entering Ukraine from a border crossing with Belarus.

The livestream video was taken at the Senkivka, Ukraine crossing with Veselovka, Belarus. The column was seen entering Ukraine around 6:48 a.m. local time.

In recent weeks, Russia has amassed a significant number of troops, vehicles and tanks in Belarus near the border with Ukraine. During that time, the two countries have held joint military exercises across the countries, and near the Belarus-Ukrainian border.

https://www.cnn.com/europe/live-news/ukraine-russia-news-02-23-22/index.html

U.S. Embassy Kyiv

@USEmbassyKyiv

We are aware of military engagements within Ukraine. We will continue to monitor and provide updates. Americans are encourage to monitor this account and @TravelGov

as we issue updates

https://twitter.com/USEmbassyKyiv/status/1496715660172353536