Thousands of people are escaping flooding triggered by a dam break in Russian-occupied Ukraine. As both sides continue to blame one other, the UN assistance head warned of "grave and far-reaching consequences" for residents in southern Ukraine.

We've observed two boats land in flooded Kherson from Russian-controlled territory - a section of the Dnipro River's left bank known as Dachi.

They've told us about Russian forces bombing the beaches as they attempted to evacuate and stole their boats.

Olga, who left with her 89-year-old mother Tamara, sobbed in the arms of friends as she described her family's terror. "It was frightening. "They're idiots," she declared.

I won't disclose the other things she called those attacking them as they sought to run to safety out of respect for people's sensitivities. 

Ukrainian officials have been collecting passports and IDs in anticipation of Russian saboteurs arriving on boats. The structure of the collapsed Kakhovka dam is expected to "deteriorate further" in the coming days, causing additional flooding, according to the UK Ministry of Defence (MoD). 

The massive dam in Russian-occupied Kherson was badly damaged in an attack yesterday, with Ukraine and Russia blaming one other.