AFP journalists have reported hearing several explosions in the centre of Kyiv, as Ukraine’s air force said it shot down two ballistic missiles targeting the Ukrainian capital and the US Ambassador to Ukraine said Russia was attacking Ukraine with “hypersonic missiles”.

The missiles were launched from the occupied Crimea peninsula and were downed at about 10.30am local time, air force commander Lt General Mykola Oleschuk said.

“Explosions in Kyiv. Go to shelters immediately,” Kyiv’s mayor, Vitali Klitschko, wrote on social media, adding in a later post that emergency services had been dispatched to three districts of the capital.

“Again this morning Russia is attacking Ukraine with hypersonic missiles. Loud explosions in Kyiv,” the US Ambassador to Ukraine, Bridget Brink, wrote in a post on X.

“Over the last 5 days, Russia has launched hundreds of missiles and drones against a sovereign country. Ukraine needs our assistance now. There is not a moment to lose.”

The head of Kyiv’s military administration said a Russian missile had damaged a residential building in the Pechersky district and details were being confirmed.

Russia has escalated air attacks on Kyiv in recent days, targeting key infrastructure in the wake of fatal Ukrainian bombardments on Russian border regions.

One of the Russian landing ships hit during a recent missile strike on occupied Crimea was “critically damaged”, Ukraine’s military intelligence agency (HUR) has said.

The Ukrainian military claimed on Sunday it had hit two large Russian landing ships as well as other infrastructure used by the Russian navy in the Black Sea during overnight strikes on the annexed Crimean peninsula.

“The defence forces of Ukraine successfully hit the Azov and Yamal large landing ships, a communications centre and also several infrastructure facilities of the Russian Black Sea Fleet in temporarily occupied Crimea,” Ukraine’s military said in a statement.

In a post on Telegram on Monday, Ukraine’s military intelligence agency said the “Yamal” suffered a “hole in the upper deck that caused it to roll to the starboard side”.

Ukraine has claimed to have destroyed around a third of Russia’s Black Sea Fleet since the start of the war, usually in attacks at night using sea-based drones packed with explosives.

Hello and welcome to the Guardian’s live coverage of the war in Ukraine.

Russia has cast doubt on assertions by the US that the Islamic State militant group was responsible for the terrorist attack on the Crocus City concert hall outside Moscow which killed at least 137 people and injured 182 others.

On Sunday, Islamic State released new footage of Friday’s deadly attack, corroborating the terror group’s claim to have masterminded the massacre, even as Russia sought to place the blame on Ukraine, which Kyiv denies.

Russia’s foreign ministry spokesperson, Maria Zakharova, has now called into question US assertions that Islamic State, which once sought control over swathes of Iraq and Syria, was behind the attack.

“Attention – a question to the White House: Are you sure it’s Isis? Might you think again about that?” Zakharova said in an article for the Komsomolskaya Pravda newspaper.

Zakharova added that the US, which has said it received intelligence that the terror group acted alone, was spreading a version of the “bogeyman” of Islamic State to cover its “wards” in Kyiv.

Here are some of the other main developments to catch up on:

• Russia’s defence ministry said its forces destroyed 11 Ukraine-launched drones over the south-western Russian Rostov region.

• Emergency power outages were introduced in Ukraine’s port of Odesa on Monday after a Russian air attack damaged one of the high-voltage facilities there, accrording to Ukraine’s top energy provider, DTEK.
  “The situation remains difficult,” DTEK wrote on Telegram. “In order to reduce the load on the network, electric transport will not operate in the city today, and industrial consumption is also limited.” The administration of Odesa said the city and the region were attacked by several waves of drones launched by Russia, with four of the air weapons shot down over the Odesa and neighbouring Mykolaiv regions.

• Russia will not stop if it wins the war in Ukraine, Jane Hartley, the US ambassador to the UK, told Sky News. She told Sky News she is “optimistic” that the US will release more funding for Ukraine, but said “anybody who thinks that Russia may stop after this, I think is wrong”. “I was ambassador [to France and Monaco] in 2014, and I saw what happened in Crimea. I don’t know why anybody would say, ‘oh this is it for Russia’,” Hartley added.

• Ukraine hit two Russian military ships stationed at the illegally occupied peninsula of Crimea, the Ukrainian military said on Sunday. The targets were the landing ships Yamal and Azov, a communications centre and other Black Sea fleet infrastructure. “It was the most massive attack in recent times,” said the Russian-appointed governor of Sevastopol, Mikhail Razvozhayev. He said a 65-year-old man was killed and four people injured. Footage shared on social media showed a large blast in the city, sending a fireball and black smoke into the air.