(AP Photo/Efrem Lukatsky)

Kyiv was rocked by a “nonstop volley” overnight as Russian forces escalated their attack on the outskirts of the Ukrainian capital, according to a reporter on the scene.

Although Kyiv itself remains in Ukrainian control, CNN’s Clarissa Ward said there were several minutes of “just heavy booms in the distance” during a live report from Ukraine to anchor Anderson Cooper in the early Saturday morning hours.