Ukraine says it has lost up to 13,000 soldiers since Russia invaded

US believes 100,000 Russian soldiers killed and wounded as both sides suspected of downplaying losses

The coffin of Valeriy Krasnyan is brought out of St. Michael's Golden-Domed Monastery in Kyiv. Getty Images

Repairmen work near a residential building damaged following a missile attack in Vyshgorod, outside of Kyiv. AFP

An elderly man walks in front of a residential building damaged following a missile attack in Vyshgorod. AFP

A boy kisses a dog while he charges his phone at the heating tent dubbed a Point of Invincibly in Bucha, Ukraine. AP

A couple uses a laptop in the heating tent. AP

Workers dig out a tire from the rubble of a destroyed storage building at a grain processing center so they can use it for repairs in Siversk, Donetsk region. Reuters

The Chernihiv region found itself on the frontline of Russia's invasion in February, when Moscow's forces were attempting to quickly seize Kyiv. Getty

Russia ultimately retreated from northern Ukraine to focus its attack on the east and south. Getty

The city of Chernihiv on November 28, 2022 in Chernihiv, Ukraine. Getty

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People receive food from AFAT - Disaster and Emergency Management Presidency in Chernihiv. Getty

The people Chernihiv queue up for hot food. Getty

Oleksandr Antonenko stands on a balcony of his apartment damaged by a recent Russian military strike in Kherson. Reuters

Mr Antonenko and his mother Liudmyla inside their apartment recently damaged by a Russian military strike in Kherson. Reuters

A woman walks in an underpass in Kyiv, on November 26, 2022. AFP

Friends hug after the arrival of a train in the southern city of Kherson. Getty

Residents sort through donated clothing at an aid centre in Kherson. Getty

A Ukrainian soldier stands with a machinegun near Liman in the Donetsk region. AP

Children attend a physical education class at Spilno School in Kyiv. Getty

A woman embraces her friend, a soldier in the Ukrainian army, in Kherson. AFP

Residents inspect a crater left by a Russian military strike in the village of Komyshuvakha in the Zaporizhzhia region. Reuters

Resident Tetiana Reznychenko walks past a work by world-renowned graffiti artist Banksy, on the wall of a destroyed building in the Ukrainian village of Horenka. Reuters

Ukrainian soldiers fire artillery at Russian positions near Bakhmut in the Donetsk region. AP

A fisherman sails his boat on the Dnipro as black smoke rises from an oil reserve in Kherson. AFP

As many as 13,000 Ukrainian soldiers have been killed since the start of Russia's invasion in February, a senior adviser to President Volodymyr Zelenskyy has said.

“We have official estimates from the General Staff … And they range from 10,000 … to 13,000 dead,” Mykhailo Podolyak told Ukraine's Channel 24 on Thursday.

Mr Zelenskyy will make the official data public “when the right moment comes”, he added.

In June, as Russian forces battled to take full control of the easternmost Luhansk province, Mr Zelenskyy said Ukraine was losing “60 to 100 soldiers per day, killed in action, and around 500 people wounded in action”.

Russian Defence Minister Sergey Shoigu said in September that 5,937 Russian troops had been killed in the nearly seven months of fighting to that point.

Both sides are suspected of downplaying their losses to avoid damaging the morale of their troops.

Top US general Mark Milley last month said more than 100,000 Russian military personnel have been killed or wounded in Ukraine, with Kyiv's forces likely to be suffering similar casualties.

Those figures — which could not be independently confirmed — are the most precise to date from the US government.

Thousands of Ukrainian civilians have been killed in the worst fighting in Europe in decades.