The man was arrested on suspicion of attempted murder and arson with intent to endanger life.
Detectives have arrested a man aged in his 80s on suspicion of attempted murder for setting fire to a house in Annalong in Down.
The incident occurred at 9pm on Saturday night in the Glassdrumman Road area of the village.
The man was subsequently arrested on suspicion of attempted murder and arson with intent to endanger life.
A man was taken to hospital following the incident where he is currently receiving treatment for his injuries.
Police in Northern Ireland are appealing to anyone who was in the area around the time, or who may have any information to contact 101 and quote the reference number 1877.
Information can also be provided to Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org.
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