Russia now has over 150,000 troops near Ukraine, U.S. official says, amid reports of more attacks

The Ukrainian government and Russian state-controlled media on Friday exchanged fresh accusations of cease-fire violations near the country’s eastern border.

In a statement on Facebook, the Ukrainian Joint Forces Operation said 45 cease-fire violations had been recorded in eastern Ukraine on Friday as of 2 p.m. local time.

The JFO alleged that 34 of those violations included the use of weapons prohibited by the Minsk agreements, which Russia, Ukraine and pro-Moscow separatists signed in 2014 and 2015 to prevent a war in eastern Ukraine.

Meanwhile, Russian state-controlled media agency RIA claimed on Friday that Ukrainian government forces had launched three shelling strikes against Russian-backed separatists.

CNBC was unable to verify either report.

The Organization for Security and Cooperation in Europe on Thursday said its mission in Ukraine had reported almost 600 cease-fire violations in the Donetsk and Luhansk regions, substantially higher than the 153 violations reported during the previous period.

Meanwhile, Michael Carpenter, U.S. ambassador to the OSCE, said on Friday that the U.S. estimated Russia had amassed between 169,000 to 190,000 military personnel near Ukraine — up from 100,000 on Jan. 30.

The east of Ukraine, near the Russian border, has long been the scene of low-level fighting. The OSCE has regularly reports violations of the cease-fire in eastern Ukraine during the eight-year conflict, in which around 13,000 people have died.

The new allegations came after Russian officials reportedly circulated a document at the U.N. Security Council meeting on Thursday which Reuters reported made allegations that war crimes had been committed in Ukraine, and accused the Ukrainian government of “exterminating the civilian population” in the country’s east.

A U.S. official dubbed those accusations as “categorically false,” according to Reuters.

The U.S. has warned that Russia could use false assertions, including claims about the conflict in eastern Ukraine, as a pretext for an invasion.

U.S. Secretary of State Antony Blinken told the U.N. Security Council on Thursday that these assertions could include a fabricated terrorist bombing inside Russia, the invented discovery of a mass grave, a staged drone strike against civilians or a fake — or real — attack using chemical weapons, any of which could be blamed on Ukraine.

Moscow has repeatedly denied that it intends to invade Ukraine, and has claimed this week that its soldiers have begun to withdraw from their temporary posts at the border with Ukraine. However, Western officials have cast doubt on those assertions, saying that intelligence in fact suggests more troops have joined those already at the border in recent days.

Carpenter, the U.S. ambassador to the OSCE, on Friday said: “We are aware that Russia is intent on creating a pretext to justify an invasion into Ukraine.”

He added that over the past several weeks, the U.S. has acquired information that suggests Moscow is planning to stage a fabricated attack by Ukrainian military or security forces against Russian sovereign territory, or against Russian-speaking people in separatist-controlled territory, to justify military action against Ukraine.

Both U.S. President Joe Biden and British Prime Minister Boris Johnson have also said they believe Russia is engaged in a “false flag” operation.

Blinken also said that if Russia launched an invasion, its tanks and soldiers would be likely to advance on key targets including the Ukrainian capital, Kyiv, which has a population of 2.8 million people.