Kharkiv offensive: Ukrainian army says it has tripled retaken area

Ukraine's military says its forces have retaken over 3,000 sq km (1,158 sq miles) during a rapid counter-offensive in eastern Ukraine.

The remarkable advance, if confirmed, means Kyiv's forces have tripled their stated gains in little over 48 hours.

On Thursday evening, President Zelensky put the figure at 1,000 sq km, and then 2,000 sq km on Saturday evening.

The BBC cannot verify the Ukrainian figures, and journalists have been denied access to the frontlines.

On Saturday, the eastern counter-attack saw Ukrainian troops enter the vital Russian-held supply towns of Izyum and Kupiansk.

But UK defence officials have warned that fighting has continued outside those towns. And officials in Kyiv said Ukrainian forces were still fighting to gain control of a number of settlements around Izyum.

Russia's defence ministry confirmed its forces' retreat from Izyum itself and Kupiansk, which it said would allow them"to regroup" in territory held by Moscow-backed separatists.