This video can not be played

President Zelensky has thanked the European Union for the support it has given to Ukraine, describing heads of state and government gathered in Brussels as "real leaders".

Meanwhile, President Trump has said Ukraine's resumption of strikes on Russian oil refineries was a disgrace.

Zelensky made the comment flanked by European Commission President Ursula von der Leyen and European Council President António Costa.

The BBC's Nick Beake reports from Brussels.

Read more on this story.

Watch: Will Ukraine get the support needed as tensions with US rise? Video, 00:01:09Watch: Will Ukraine get the support needed as tensions with US rise?

Up Next. Watch: What does Starlink have to do with the Ukraine-Russia war? Video, 00:01:33Watch: What does Starlink have to do with the Ukraine-Russia war?

Moment drone hits supermarket in Odesa. Video, 00:00:29Moment drone hits supermarket in Odesa

Did Tesla really just unveil a flying car? Video, 00:01:18Did Tesla really just unveil a flying car?

Israeli settlers attack Palestinians in West Bank during olive harvest. Video, 00:01:05Israeli settlers attack Palestinians in West Bank during olive harvest

Community 'heartbroken and horrified' after Oregon school shooting. Video, 00:00:29Community 'heartbroken and horrified' after Oregon school shooting

At the scene of a school roof collapse in Pakistan. Video, 00:01:13At the scene of a school roof collapse in Pakistan

An Australian band’s ‘unreal’ journey to break a gig world record. Video, 00:02:01An Australian band’s ‘unreal’ journey to break a gig world record

Watch: Pupils heard 'cracking' sound  moments before Pakistan school roof collapse. Video, 00:01:08Watch: Pupils heard 'cracking' sound  moments before Pakistan school roof collapse

Watch: Harry and Meghan at first joint engagement since UK return. Video, 00:01:13Watch: Harry and Meghan at first joint engagement since UK return

What if you could turn off your algorithm? Australia is about to try. Video, 00:01:11What if you could turn off your algorithm? Australia is about to try

Why Zelensky's meeting with Burnham matters. Video, 00:01:30Why Zelensky's meeting with Burnham matters

'Nowhere to escape' - Indonesians share footage of orange haze blanketing towns. Video, 00:00:50'Nowhere to escape' - Indonesians share footage of orange haze blanketing towns