• UK, Ukraine, France, and Germany leaders call for immediate ceasefire in Ukraine and discuss ramping up production of defensive weapons and deep-strike capabilities.
• Russian President Putin rejects proposal for face-to-face talks with Ukrainian President Zelensky amid ongoing conflict.
• Russian drone strike damages storage center for spent nuclear fuel near Chernobyl, sparking fire and raising concerns about nuclear material security.

The leaders of the United Kingdom, Ukraine, France and Germany have discussed the "urgent need" to ramp up production of defensive weapons and deep-strike capabilities after Russia fired Oreshnik missiles at Ukraine, Downing Street said.

British Prime Minister Sir Keir Starmer hosted Ukrainian leader Volodymyr Zelensky along with French President Emmanuel Macron and German Chancellor Friedrich Merz – some of Kiev's staunchest allies – at Number 10 Downing Street on Sunday evening for talks on the war.

The leaders called on Russian President Vladimir Putin to agree "an immediate and complete ceasefire" with the current line of contact as a starting point for any negotiations, Downing Street said.

A readout said: "They condemned Russia's large-scale missile and drone attacks – including the repeated use of the Oreshnik missiles – on Ukrainian cities with a tragic toll on civilians, as well as irresponsible and dangerous Russian drone incursions into NATO territory."

"They expressed their condolences to all the victims," the statement read further.

"They discussed how to use the upcoming G7 summit at Evian, the next meeting of the coalition of the willing, and the NATO summit at Ankara to best coordinate further support for Ukraine based on its prioritized needs, including further pressure on Russia's war economy and an increased pledge of military and defence support for Ukraine at the NATO summit."

"The leaders underlined the urgent need to scale up the production of interceptors and co-develop anti-ballistic missile and deep strike capabilities, and to support the future sustainability of the Ukrainian armed forces."

The meeting on Sunday evening comes on the day a Russian drone strike damaged a storage centre for spent nuclear fuel in the Kiev region, nine miles from the Chernobyl nuclear power plant.

The attack sparked a fire that was extinguished within an hour and radiation remains within safe levels, officials said.

The Ukrainian leader hit out at the "extremely vile" strike saying it was "an increase in Russia's brazenness".

International Atomic Energy Agency chief Rafael Grossi said the incident was "deeply concerning" due to the large amounts of nuclear material held at the facility.

On Friday, Russian President Vladimir Putin rejected a proposal by Zelensky for face-to-face talks on the four-year-old war, claiming he saw "no point" in a meeting.