[Chad C. Mulligan]

“Unable to stop the offensive of the Russian forces, the Ukrainian army has begun to use phosphorus munitions on a massive scale near the Gostomel airdrome in Kiev’s suburbs"

TASS. No independent confirmation possible.

[jacknhoo]

“TASS. No independent confirmation possible.”

____________________________

That’s right the only ones doing it shut down their operations soon after the war started:

The OSCE Special Monitoring Mission to Ukraine (SMM) started its activities on 21 March 2014 and discontinued its operations on 31 March 2022.
https://www.osce.org/special-monitoring-mission-to-ukraine-closed