Polish PM makes border crossing pledge after blockades by farmers

A Polish border guard gives instructions as drivers wait to cross the border into Ukraine at Medyka (Czarek Sokolowski/AP/PA)

Polish Prime Minister Donald Tusk has said border crossings with Ukraine are being added to a list of critical infrastructure to ensure that all military and humanitarian aid can reach the country without any delays.

Mr Tusk spoke following protests by Polish farmers that have included border blockades and the spilling of Ukrainian grain from freight trains at a Polish border crossing.