The claim has been disproved by the OSCE's Special Monitoring Mission (SMM) to Ukraine.  On December 8, an SMM camera at the Donetsk water-treatment facility did indeed record ceasefire violations. But the OSCE said in its daily report that the projectiles flew from east to west and made no mention of white phosphorus. Kyiv's Anti-Terrorist Operation denounced the incident as one more case of "Russian propaganda." https://www.facebook.com/ato.news/posts/1782946181716180, https://www.unian.info/war/2289829-osce-surveillance-camera-at-donetsk-water-filtration-plant-records-increased-fire-by-militants.html