Irish police are investigating the explosion of a device at two properties in Limerick city.
The incident occurred in Hyde Road at about 3.10am on Saturday.
Gardai and emergency services attended the scene.
A man in his early 30s suffered injuries to his arm which were non-life threatening.
Police are appealing for witnesses to come forward.
Anyone with camera footage from the Hyde Road area between 2.30am and 3.15am is asked to make it available.
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