A Vietnamese man remained in garda custody last night after two shocking arson attacks in north Dublin yesterday afternoon.
Footage emerged on social media of two cars on fire outside a house in Temple View Green, Clarehall.
Gardai said the incident happened at 12.55pm and that the suspect (40) was in possession of a meat cleaver.
The man under arrest was being questioned at Coolock Garda Station.
The target of the arson attack is understood to be a female Chinese national, aged 54.
No one was injured in the incident, which is being investigated as "criminal damage by fire".
The arrested man is also suspected of setting fire to the outside of an apartment complex in the Newtown Court area of Coolock before the attack in Clarehall.
Large plumes of smoke could be seen coming from the vehicles.
A terrified woman was seen fleeing the house just before Dublin Fire Brigade arrived at the scene.
One line of investigation is that the incident may be linked to a personal dispute.
The suspect in custody is said to live just yards from the scene of the arson attack and resides at Temple View Row in the northside estate.
Neighbours yesterday expressed shock that such an incident happened in what they said was normally a "very quiet estate".
Gardai said they were following a definite line of inquiry and believe the incidents could be related to an ongoing row involving the restaurant trade.
Last night it was unclear whether a confrontation between two men - who appeared to be armed with a machete and meat cleaver - was linked to the arson attack.
Footage of this was also circulated on social media.
The incident happened close to the scene of the arson attack when the duo were involved in a "face-off" - but no one appeared to have been assaulted in the incident.
Gardai said they had not yet recovered any weapons as part of their investigation into the incident.