Ukraine and Russia: What you need to know right now

Ukraine has denied any military target was hit, saying the attack killed at least 23 people and struck a cultural centre used by retired veterans. * Russian forces have been slowly advancing west following shelling and probing assaults towards the town of Siversk in Ukraine's Donetsk region from Lysychansk, Britain's defence ministry said on Friday.

A Ukrainian city far from the frontline mourned its dead and cleaned its streets on Friday, a day after a Russian missile attack killed at least 23 people and wounded scores. ECONOMY/DIPLOMACY

* The European Commission is set to adopt its seventh package of sanctions against Russia, which will add a ban to the import of Russian gold and tweak existing restrictive measures to avoid hampering food exports, two officials said on Friday. * Russia's proposals on how to bring about a resumption of Ukrainian grain exports were "largely supported" by negotiators taking part in talks this week in Istanbul, the Russian defence ministry said on Friday, and an agreement was close.

* U.S. Treasury Secretary Janet Yellen condemned Russia's "brutal and unjust war" in Ukraine and said Russian finance officials taking part in a G20 meeting in Indonesia shared responsibility for the "horrific consequences" of the war. * G20 finance leaders meeting in Bali must make progress tackling the global economic threats sparked by Russia's war in Ukraine or the humanitarian consequences would be catastrophic, host Indonesia said on Friday.

* A British aid worker who was detained by Russian-backed separatists in Ukraine and accused of being a mercenary has died, an official in the self-proclaimed Donetsk People's Republic said on Friday. * Poland will buy 116 used Abrams tanks from the United States, the Polish defence minister said on Friday, as Warsaw strengthens its armed forces following Russia's invasion of Ukraine.

FIGHTING * Russia's defence ministry said Thursday's cruise missile strike on the Ukrainian city of Vinnytsia was directed at a building where top officials from Ukraine's armed forces were meeting foreign arms suppliers. Ukraine has denied any military target was hit, saying the attack killed at least 23 people and struck a cultural centre used by retired veterans.

* Russian forces have been slowly advancing west the following shelling and probing assaults towards the town of Siversk in Ukraine's Donetsk region from Lysychansk, Britain's defence ministry said on Friday. "Bakhmut is likely to be the next objective, once Siversk is secured," the ministry tweeted in a regular bulletin. * Ukraine is using Western-supplied long-range weapons and 155mm "smart" shells to hit Russian ammo dumps and supply lines, forcing Moscow to rethink how it supplies fuel and ammunition to the front line, a Ukrainian general said.

* Reuters could not independently verify the battlefield accounts.