KYIV, Ukraine (AP) — Russia is extending military drills near Ukraine’s northern borders after two days of sustained shelling along the contact line between Ukrainian soldiers and Russia-backed separatists in eastern Ukraine.

Get our free mobile app

Ukraine's president appealed for a cease-fire.

The exercises in Belarus, which borders Ukraine to the north, originally were set to end on Sunday.

The joint drills brought a sizable contingent of Russian forces to Belarus, and their presence raised concern that they could sweep down to Ukraine's capital in a Russian invasion.

A top European Union official said, “The big question remains: Does the Kremlin want dialogue?”

Answers to 25 common COVID-19 vaccine questions

Vaccinations for COVID-19 began being administered in the U.S. on Dec. 14, 2020. The quick rollout came a little more than a year after the virus was first identified in November 2019. The impressive speed with which vaccines were developed has also left a lot of people with a lot of questions. The questions range from the practical—how will I get vaccinated?—to the scientific—how do these vaccines even work?

Keep reading to discover answers to 25 common COVID-19 vaccine questions.