Tens of thousands of Russians are being sent to eastern Ukraine, the Luhansk governor says.
A large Russian attack is likely to come from the east and south, Kyiv says, but it has the reserves to repel it.
The BBC watches engineers and technicians as they race to repair damage across the country.
He was speaking in Volgograd – formerly Stalingrad – to mark a World War Two anniversary.
Ukraine’s defence minister says Russia has amassed some 500,000 men for an attack in the coming weeks.
Authorities launch a fresh wave of raids, including on leading tycoon Ihor Kolomoisky.
While morale remains high, Ukrainian forces in the east fear the Russians are improving.
The US rules out sending jets to Ukraine, but France says “nothing is excluded” ahead of talks in Paris.
It is the latest European country to say it is increasing military spending as a result of the conflict.
Denys Sosnenko was was killed by an anti-tank mine while helping to recover the remains of soldiers.
The request for the jets comes just days after Germany committed to supplying Leopard 2 tanks.
Moscow is accused of giving refugees Russian passports and allowing them to be adopted.
Moscow accuses Poland of attempting to “rewrite history” after it is not invited to the event.
The government in Kyiv is trying to tackle corruption head-on, but it’s a risky strategy.
Eleven people have been killed and 11 others injured after strikes hit buildings in several regions.
While the pledged US tanks represent an upgrade – they may arrive too late for the next phase of war.
The BBC’s Analysis Editor examines the background to Germany’s decision to send Leopard 2 tanks to Ukraine.
Ukraine hails the announcements as a turning point, while Russia says they are a provocation.
Chancellor Olaf Scholz’s indecision has earned him criticism both nationally and internationally.
The country is under increasing international pressure to send its Leopard 2 tanks to Ukraine.
Ukrainian civilians are returning to Lyman, close to the front line, despite the threat of strikes.
Adam Kalinin has been camping in the Russian wilderness since September to avoid fighting in Ukraine.
The former prime minister says it is a “privilege” to visit the country once more.
Zelensky adviser tells West to “think faster” as pressure grows on countries to send tanks to Ukraine.
The death of senior officials in a crash near Kyiv is a reminder of the dangers of helicopter travel.
Berlin denies it is preventing countries from donating Leopard 2s, but Poland criticises its “hesitation”.
A Russian news video showing Serbians being trained to fight in Ukraine prompts fury in Belgrade.
Andrew Harding goes under fire on the front line in eastern Ukraine after recent Russian gains.
The German Chancellor is under pressure to supply tanks to Ukraine, but will not do so without US approval.
Ukraine’s interior minister is among the 14 killed in the helicopter crash beside a nursery.