Serbia, in it's official statement, condemned the Ukrainian invasion and supports its territorial integrity, while drawing parallels between the 1999 NATO aggression and what is happening now in Ukraine. Saying all that, it will not impose any sanctions on Russia.
To translate:
The US embassy: "The US salutes the reinforced attitude of Serbia and it's president in their support of the Ukrainian territorial integrity which has been violated by the illegal and unprovoked attack by Russia".
Russia: "Thank you Serbia".
The Serb at the top: "They must be ****ing with us".