Ukraine's Defense Minister Oleksii Reznikov said on Sunday the country had received a second consignment of weapons from the United States as part of defensive aid totalling $200 million.

Washington has said it would continue to support Ukraine amid concerns in Kyiv and among its Western allies over tens of thousands of Russian troops amassed on its border. Russia denies planning a military offensive.

"The second bird in Kyiv! More than 80 tons of weapons to strengthen Ukraine's defense capabilities from our friends in the USA! And this is not the end," Reznikov wrote on Twitter.

About 90 tons of "lethal security assistance," including ammunition, from the package approved by the U.S. in December arrived in the Ukrainian capital on Saturday.

The deliveries followed U.S. Secretary of State Antony Blinken's visit to Kyiv last week amid concerns from Kyiv and its Western allies over tens of thousands of Russian troops amassed at the border with Ukraine.

Washington approved the $200 million package in December.

"The United States will continue providing such assistance to support Ukraine's Armed Forces in their ongoing effort to defend Ukraine's sovereignty and territorial integrity against Russian aggression," it said on Facebook.