Gardai are investigating the circumstances surrounding discovery of two men at a house in Blanchardstown.
The men were found in an unconscious state at the house on Westhaven Estate, in Hartstown Road between 4 and 5pm this evening.
The men, one in his 30s and the other in his 20s, were removed to James Connolly Memorial Hospital where they were later pronounced dead.
The scene has been preserved for technical examination and the state pathologist has been informed.