WASHINGTON: US President Joe Biden and Russian President Vladimir Putin will hold a video call on Tuesday to deal with military tensions over Ukraine other topics.

Biden wants to discuss US concerns about Russia's military buildup on the Ukraine border, a US source said on Saturday, as well as strategic stability, cyber and regional issues.

He said "we're aware of Russia's actions for a long time and my expectation is we're going to have a long discussion with Putin."

Biden told reporters on Friday as he departed for a weekend trip to Camp David. "I don't accept anybody's red lines.”

The Kremlin said “the two will also talk about bilateral ties and the implementation of agreements reached at their Geneva summit in June.”

He said "the conversation will indeed take place on Tuesday."

He said "Bilateral relations, of course Ukraine and the realisation of the agreements reached in Geneva are the main (items) on the agenda.”

More than 94,000 Russian troops are massed near Ukraine's borders. Ukraine Defence Minister Oleksii Reznikov said on Friday that Moscow may be planning a large-scale military offensive for the end of January, citing intelligence reports.