Trump confirms new weapons deal for Ukraine and threatens ‘severe’ tariffs on Russia if war doesn’t end in 50 days – as it happened

This live blog is now closed. For the latest on Trump's Ukraine announcement, you can read:

• Full report - Trump does deal with Nato allies to arm Ukraine and warns Russia of severe sanctions

• Analysis - Trump's hazy Ukraine arms announcement marks a tonal U-turn

Ukrainian intelligence agents killed members of a Russian secret service cell wanted on suspicion of having shot dead a colonel last week, the SBU said.

The SBU intelligence agency said in a statement that the operation had sought the arrest of the agents of Russia's Federal Security Service (FSB), who it believes were behind the killing of Col Ivan Voronych - also a member of the SBU security service - in Kyiv on Thursday.