The US embassy in Kyiv has issued a warning to its staff to shelter in place due to a potential air attack from Russia on November 20. The alert comes after President Joe Biden gave Ukraine permission to use long-range missiles against Russian targets, which has raised tensions.

In a message posted on its website, the embassy said it had received information about a possible significant air attack and, out of caution, would remain closed. US citizens in Kyiv were also advised to prepare to shelter immediately if an air alert is declared.

This warning follows a major policy change by the US, which lifted a ban on Ukraine using long-range missiles, like the ATACMS, that can strike targets up to 190 miles away inside Russia. This new capability gives Ukraine a powerful tool to defend itself against Russian long-range weapons, which had previously been able to strike Ukrainian territory without fear of retaliation.

The decision to allow Ukraine to use these missiles came after months of delays and political debates in the US. Additionally, reports have surfaced that North Korean troops have been sent to reinforce Russian lines in the Kursk region of Russia, where Ukrainian forces have been active.

In response to the increased threat of long-range missile strikes, Russia has reportedly moved many of its fighter jets and bombers away from airbases within range of the missiles, seeking to protect its military assets.

This latest development marks a significant escalation in the conflict, as the war between Ukraine and Russia continues to evolve. The US decision to send long-range missiles to Ukraine is seen as a message to Russia and its allies, including North Korea, about the US’s commitment to supporting Ukraine’s defense.