Russia-Ukraine live: German foreign minister pledges more weapons during surprise trip to Kharkiv; Russia fighting for control of Soledar

Annalena Baerbock says ‘no doubts further German military aid will come’; Russian mercenaries fighting ‘heavy, bloody battles’

The Russian energy ministry says it is working on additional measures to limit discounts to international benchmarks on Russian oil prices, Reuters reports. The move comes after the west imposed price caps.

Last month Vladimir Putin signed a decree that banned the supply of crude oil and oil products from 1 February for five months to nations that abide by the cap.