Russia-Ukraine war: what we know on day 131 of the invasion

Ukrainian forces retreat from Lysychansk as Zelenskiy vows to regain the key eastern city with the help of long-range western weapons

Ukrainian forces have raised the country's flag on Snake Island, a strategic and symbolic outpost in the Black Sea that Russian troops retreated from last week after months of heavy bombardment. The military operation has been concluded, and ... the territory, Snake Island, has been returned to the jurisdiction of Ukraine," Natalia Humeniuk, spokesperson for Ukraine's southern military command, told reporters. Ukraine has considered control of the island as a critical step in loosening Moscow's blockade on its southern ports.

Leaders from dozens of countries, international organisations and the private sector gathered in Switzerland today to hash out a Marshall plan' to rebuild war-ravaged Ukraine. Ukraine's president, Volodymyr Zelenskiy, who took part virtually, earlier warned that the work ahead in the areas that have been liberated alone was really colossal". And we will have to free over 2,000 villages and towns in the east and south of Ukraine," he said.

Ukraine's prime minister Denys Shmygal has put a price tag on the recovery of his country at $750bn (620bn). He said the Ukrainian government believed a key source of funding for the recovery plan should be assets confiscated from Russian oligarchs, and that there had been more than $100bn of direct damage to infrastructure from Russia's invasion so far.

Ukrainian forces on Sunday retreated from Lysychansk as Russia claims it is now in control of Ukraine's eastern Luhansk region. The Russian defence minister, Sergei Shoigu, said Moscow's forces had established full control" over Lysychansk and several nearby settlements. Ukraine's military command confirmed that its troops had been forced to pull back from the city, saying there would otherwise be fatal consequences". Lysychansk was the last Ukrainian-controlled city in the Luhansk region.

Zelenskiy vowed to regain Lysychansk with the help of long-range western weapons. We will return thanks to our tactics, thanks to the increase in the supply of modern weapons. Ukraine does not give anything up," he said in an evening address.

Russian President Vladimir Putin has congratulated Russian troops on liberating" the eastern Ukrainian region of Luhansk. In a televised meeting with defence minister Sergei Shoigu on Monday, Putin congratulated Russian forces on their victories in the Luhansk direction". Reuters reports he said those who participated in the combat should absolutely rest and recover their military preparedness", while other units continue fighting in other areas.

Russia will shift the main focus of its war in Ukraine to trying to seize all of the Donetsk region after capturing neighbouring Luhansk, the Luhansk region's governor Serhai Haidai has said. He claimed about 8,000 civilians remain in occupied Sievierodonetsk and about 10,000 in newly occupied Lysychansk.

Russian forces hit a secondary school in the Kharkiv district at 4am Monday morning, according to a report from Oleh Synyehubov, governor of the region. There were no reported casualties. He also said three people were killed and six injured in an attack on the village of Bezruky in his region.