Explosives and ordnance disposal experts from the Defence Forces conducted the operation at the Little Britain Street location Friday night.
Emergency services were called to the De Paul Homeless Hostel on Little Britain Street in Dublin's north inner city just after 3 p.m. yesterday afternoon.
A blast inside the premises resulted in the death of a man in his 30s.
At that time, the hostel was home to seventy-three other people, all of whom were later transferred to overnight accommodations without suffering any injuries.
Before being evacuated, residents had reported hearing a blast and then seeing smoke.
The hostel's operator, De Paul, said the explosion was contained to a single room and called it a isolated incident.
The Army bomb disposal team arrived on the location late last night and conducted post-blast examination and clearance, which included a controlled explosion.