The owner of the Dublin head shop which caught on fire this morning believes that the fire was started deliberately.
Capel Street, where the store is located, will remain closed for most of this morning following a major blaze.
The fire broke out at around 6am this morning at the Nirvana head shop.
Several units of the Dublin Fire Brigade tackled the blaze and gardaí have sealed off the street.
There is no access from any of the approach roads and smoke is hampering visibility in the area. The Luas is unaffected.
Gardaí say it is too early to say what caused the fire, but an investigation is underway.