Kherson flooding: Ukraine evacuation boat attacked by Russia, killing three

Rescuers react to Russian shelling during evacuation efforts of those trapped by flooding in Kherson region

Three people were killed after Russia attacked a boat carrying evacuees from a flooded area in Kherson, the regional governor said.

Ukraine has been trying to rescue people trapped on the Russia-held eastern bank of the Dnipro River since the Nova Kakhovka dam was destroyed.

Oleksandr Prokudin said Russian troops shelled the evacuation boat and shot a 74-year-old man dead.

The man was trying to rescue a woman from gunfire, Mr Produkin said.

Two police officers were also injured.

The Nova Kakhovka dam burst on Tuesday, releasing a huge torrent of water which quickly flooded vast areas of land on both sides of the Dnipro river.

Ukraine has blamed Russia for "blowing up" the dam, located in a Russian-controlled area of Ukraine. Russia has denied this and has accused Ukraine of being responsible for its destruction.

The BBC has not verified either claim, although it appears likely that Russian forces, who controlled the dam, decided to blow it up in order to complicate Ukraine's ongoing counteroffensive.

• What we know about Ukraine dam incident

The eastern bank of the Dnipro River has been one of the areas worst hit by the flooding, with hundreds of people there posting on the Telegram app asking to be rescued.

Ukraine's military says it has been co-ordinating rescues from the eastern bank, but claimed "fearless volunteers" were carrying out some of the evacuations.

One of those involved in the rescue effort, Viktor, told the BBC he came under Russian fire while attempting a trip, saying Russian soldiers were "waiting for volunteers or soldiers to arrive so they can shoot them".

The BBC has not been able to independently verify these claims.

Size of flood recedes

Meanwhile, the size of the flooded area in Kherson region has receded, officials said, but experts and officials fear infectious diseases may spread in polluted waters.

Thousands of Ukrainian homes remain flooded, and tens of thousands of people have lost access to drinking water.

Behind the dam, the huge Kakhovka reservoir - a vital source of water for the region - has drained of water.

The World Health Organization (WHO)'s Ukraine representative, Dr Jarno Habicht, told the BBC the situation was "devastating" and providing safe, clean water was a priority. He said it was important to keep an eye on water-borne illnesses and that precautionary sample testing was ongoing.

The UK's defence ministry said people were facing a "sanitation crisis" with limited access to safe water and an increased risk of water-borne diseases.

While Ukrainian officials said no cases of infectious illnesses have been reported so far, the city of Kherson - around 100km (62 miles) from the Kakhovka dam and badly affected by the floods - has introduced restrictions on the use of river water in order to prevent their spread.

The flooding of houses and sewage facilities means the water is now highly polluted, the city military administration said, meaning that bathing, fishing and drinking the water, or giving it to animals, is prohibited.

Ukraine's interior ministry said 32 settlements had been flooded in Ukrainian-controlled Kherson, while another 14 were flooded in the Russian-controlled part. Another 31 settlements were flooded in the Mykolayiv region. 

The destruction of the Kakhovka dam has also likely led to the disruption of water supplies to Crimea, which was illegally annexed by Russia in 2014.

The North Crimean Canal draws its water supply from the Kakhovka reservoir, located behind the now-destroyed dam.

Ukrainian hydro energy company Ukrhydroenergo said the water level in the reservoir had fallen by more than 7m (23ft) and on Sunday the UK defence ministry warned that "water will soon stop flowing" to the peninsula.

Drone footage filmed after the dam breach appears to show significantly reduced water levels near the entrance to the canal.

Drone footage appears to show water drying up at the mouth of the North Crimean Canal

Whoever was responsible for the destruction of the Kakhovka dam will have done so knowing that it would deprive Crimea of badly needed fresh water.

The canal was blocked by Ukraine following the annexation of Crimea in 2014, but Russia quickly unblocked it after it invaded southern Ukraine last year.

Russian commanders may have concluded that rendering the waterway useless again by blowing up the dam might have seemed like a necessary, if extreme, price to pay for complicating Ukraine's military plans.

On Saturday, Ukrainian President Volodymr Zelensky confirmed that his country's long-awaited counter-offensive against Russia had started.

"Counter-offensive and defensive actions are taking place," he said on Saturday.

Ukrainian troops are reported to have advanced in the east near Bakhmut and in the south near Zaporizhzhia, and have carried out long-range strikes on Russian targets.

Ukraine said on Sunday that it had captured three villages in the south-east of the country, and that these were the first liberations of the counter-offensive.

Additional reporting by Paul Adams.