He was one of the first persons to join EOKA and when the struggle broke out, on April 1, 1955, he operated in the Ammochostos harbour area where he worked. His biggest achievement was the theft of a large amount of British weaponry and ammunition after it was unloaded from the ship and before it could be stored in the local depot.
Dimitriou was tried, convicted and executed by hanging on May 10, 1956, along with Michalis Karaolis. He was buried in the Imprisoned Tombs in the Central Jail of Lefkosia. The death of the two men sparked anti-British riots in Greece where 4 persons died and 200 were injured.