Ukraine's counter-offensive appears to be intensifying along sections of the front line but Kyiv warns progress is likely to remain slow.
Here are the latest developments:
- Ukraine says it has had success on one of the front lines in the Donetsk region in south east, as fighting continues around the eastern city of Bakhmut
- Western officials talk of a major thrust taking place but Ukraine warns the extent of Russia's defences means progress will continue to be slow
- Russia has continued its extensive missile attacks against Ukraine's port and grain infrastructure, destroying a historic cathedral in Odesa
Ukraine launches 'intense' assault
Ukraine has continued its counter-offensive operations, and says its troops have had success on one of the front lines in the south east, taking the village of Staromaiorske, in Donetsk, about 150km (90 miles) east of city of Zaporizhzhia.
And the US-based Institute for the Study of War said an "intense frontal assault" had also been launched towards Robotyne, in the Zaporizhzhia region, about 10km (6 miles) south of the town of Orikhiv.
Unnamed US defence officials have told American outlets that a new push has begun in the Ukrainian counter-offensive.
This has not been confirmed by Ukraine although Russian President Vladimir Putin told reporters in St Petersburg that attacks by Ukrainian troops had "significantly" intensified.
He insisted Ukraine had had no success, adding: "All counter-offensive attempts were stopped, and the enemy was pushed back with high casualties."
But Russian-backed militia leader Aleksandr Khodakovsky contradicted Mr Putin, saying Ukraine had methodically shelled Staromaiorske for several days and made gains, holding on to the outskirts and pushing on.
Fighting around Bakhmut continues
Elsewhere on the front line, fighting has continued around what is left of the city of Bakhmut – which has endured some of the heaviest fighting of the war and has been under Russian control for several months.
Ukrainian officials said fighting is ongoing south west of the city near villages including Andriivka.
Ukraine's counter-offensive began on a number of fronts last month but has seen very few clear gains so far.
Kyiv's generals have warned that fast results are almost impossible because of Russia's fortified defensive lines and rows of minefields.
Gen Oleksandr Tarnavskyi says Russia's military has displayed "professional qualities" by preventing Ukrainian forces from "advancing quickly", but added: "Any defence can be broken but you need patience, time and skilful action."
Cathedral destroyed in Odesa
Meanwhile, Russia has continued to target Ukraine's port and grain infrastructure, destroying a historic cathedral in Odesa in missile strikes, officials have said.
Russia claimed its targets in the port city were being used to prepare "terrorist acts" and blamed the attack on Ukrainian air defences.
Odesa head Oleh Kiper said in his Telegram channel that Russia had also attacked infrastructure at Ukrainian ports of Reni and Izmail on the River Danube for four hours with Iranian-made drones on Monday – just across the river from Nato-member Romania.
Moscow has been launching near-constant attacks on Ukraine's grain infrastructure since Russia withdrew from a landmark grain deal – officials in Ukraine say more than 60,000 tonnes of grain have been destroyed.
The deal was struck in July 2022 between Russia and Ukraine – brokered by Turkey and the UN – allowing cargo ships to sail along a corridor in the Black Sea 310 nautical miles long and three nautical miles wide.
Mr Putin says the West was not keeping its side of the bargain and has offered Russian grain to six African countries – Burkina Faso, Zimbabwe, Mali, Somalia, Central African Republic and Eritrea – but has been urged to renew the deal at a summit of African leaders he is hosting.
- What was the Ukraine grain deal?
More than a year of fighting
Russia's invasion began with dozens of missile strikes on cities all over Ukraine before dawn on 24 February 2022.
Russian ground troops moved in quickly and within a few weeks were in control of large areas of Ukraine and had advanced to the suburbs of Kyiv.
Russian forces were bombarding Kharkiv, and they had taken territory in the east and south as far as Kherson, and surrounded the port city of Mariupol.
But they hit very strong Ukrainian resistance almost everywhere and faced serious logistical problems with poorly motivated Russian troops suffering shortages of food, water and ammunition.
Ukrainian forces were also quick to deploy Western supplied arms such as the Nlaw anti-tank system, which proved highly effective against the Russian advance.
By October the picture had changed dramatically and having failed to take Kyiv, Russia withdrew completely from the north.
More than a year since the invasion, Ukraine is now hoping its latest counter-offensive can turn the war in its favour.
By David Brown, Bella Hurrell, Dominic Bailey, Mike Hills, Lucy Rodgers, Paul Sargeant, Alison Trowsdale, Tural Ahmedzade, Chris Clayton, Kady Wardell, Mark Bryson, Zoe Bartholomew, Sean Willmott, Sana Dionysiou, Joy Roxas, Gerry Fletcher, Jana Tauschinsk, Debie Loizou, Simon Martin and Prina Shah.
About these maps
To indicate which parts of Ukraine are under control by Russian troops we are using daily assessments published by the Institute for the Study of War with the American Enterprise Institute's Critical Threats Project. To show key areas where advances are taking place we are also using updates from the UK Ministry of Defence and BBC research.
The situation in Ukraine is often fast moving and it is likely there will be times when there have been changes not reflected in the maps.