One of the organisations reported that Hrebenne was closed for cargo. It was confirmed that the Polish government designated the following border crossings for transports of humanitarian aid (Herbenne might be re-opened in case the below two crossings get congested):
Border crossing Dorohusk-Jagodzin (west of Lublin): https://goo.gl/maps/rSxmzqBr7ACL3q889
Border crossing Korczowa-Krakowiec (north of Przemysl): https://goo.gl/maps/QBu9tvpU3SV5j8Ep93