The European Union will likely agree to an embargo on Russian oil imports "within days", according to its largest member, Germany, as Moscow said it saw its economic ties with China growing after being isolated by the West over its invasion of Ukraine.

Ukrainian President Volodymyr Zelenskyy told global business leaders in Davos on Monday that the world must increase sanctions against Russia to deter other countries from using "brute force" to achieve their aims.

Many of the EU's 27 member states are heavily reliant on Russian energy, prompting criticism from Kyiv that the bloc has not moved quickly enough to halt supplies.