The US president says he is "disappointed" in Putin and will be sending "top-of-the-line" weapons to Ukraine, via Nato.

President Donald Trump has announced new measures targeting Russia over its ongoing war in Ukraine, threatening steep tariffs if a peace deal isn't reached within 50 days.

Trump's moves underline his growing disenchantment with Russian President Vladimir Putin over the lack of progress in U.S.-led efforts to secure a ceasefire.