GARDAI at Henry Street have launched a probe into a suspected arson attack at an apartment in the city.
A man and woman were rescued from a burning four-storey apartment block in Catherine Street late on Saturday night.
There was a second fire at the building overnight, with five units of the fire service attending the scene around 5am on Monday morning.
The pair were found in a smoke-filled bedroom on the second floor of the apartment on Saturday night, and it is understood the inferno may have been started on purpose.
Before the fire broke out, it is understood there was an argument in the apartment complex.
Another line of investigation gardai are looking at is that there may have been more than one fire in the building.
The man and woman are being treated at University Hospital Limerick for the effects of smoke inhalation.
Three units of the Limerick Fire Service along with the gardai attended the scene of the blaze, which was reported just after 10 o’clock on Saturday night.
Two teams of fire fighters wearing breathing apparatus entered the building. They quickly located the two people on the second floor, with the woman unconscious at the time.
The pair were then treated by paramedics outside the apartment in the city centre.
Anyone with information can contact Henry Street garda station at 061-212400.