US president Joe Biden and other members of the G7 are set to announce long-term security commitments for Ukraine as they hold talks with the country’s president Volodymyr Zelenskyy at the Nato summit in Vilnius, Lithuania, on Wednesday.

“The United States along with G7 leaders will announce our intent to help Ukraine build a military that can defend itself and deter a future attack,” said Amanda Sloat, senior director for Europe in the US National Security Council.

The arrangements will provide Ukraine with more weapons and other assistance over the long term. They aim to formalise ad hoc announcements from western powers and assuage concerns from Ukraine and more hawkish Nato members who want to see a concrete pathway for Kyiv to join the alliance.