High Representative Kaja Kallas has urged Ireland to clarify whether its continued sales of alumina to Russia help build the missiles and drones that strike Ukraine.
Sold as white powder, alumina is the key raw material used to make aluminium, a lightweight metal commonly found in weapons on the battlefield.
Kallas discussed the issue during a meeting on Tuesday with Irish Foreign Minister Helen McEntee in Dublin. Kallas also met with Irish Prime Minister Micheál Martin.
"Europe must close all loopholes, tighten sanctions enforcement and ensure our commitments are backed by deeds," Kallas said after the talks.
"No European products should end up in drones and missiles that kill Ukrainian civilians."
