The Patriot surface-to-air missile system has become one of Ukraine's most important platforms during Russia's full-scale invasion, which began in February 2022. Since 2023, Patriots in Ukraine have been used to down drones, ballistic missiles and Russian aircraft.

The US president says he is "disappointed" in Putin and will be sending "top-of-the-line" weapons to Ukraine, via Nato.

The US president said he was "very unhappy" with Russia and warned there would be "very severe tariffs" if there was no deal to end the war in Ukraine in 50 days. DW has more.