A hunter has been detained in police custody till January 2019 after he shot his wife and his brother dead for having sex.

54-year-old Oleg Kirkunov, a Russian, reportedly told the police his brother Evgeny had joined him and his wife for a meal and drinks then stayed the night at his house in oil city Ufa.

However, he woke in the night and realised his wife, Olga, was no longer lying beside him and went to look for her and heard “noises” coming from his spare bedroom.

“He entered the room and saw his wife making love to his brother,” reported Ufa1 news agency.

The unemployed man – a keen hunter – then grabbed his Saiga gun and shot his wife in the head as she lay in the bed, say police.

Then he gunned down his 65-year-old brother who had dressed and was trying to escape. Both lovers died on the spot.

Graphic images show Olga Sukhanova, 44, lying dead on a bed with a gaping head wound and a man’s body lying nearby on the floor after the shooting.

The cuckolded husband then immediately called police and confessed to the killings – and the reason he shot them.

The Russian Investigative Committee confirmed that “the criminal has been detained”.

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A statement said:

“Charges have been brought against him. He is accused of double murder. Investigators will appeal to court to seek his detention for two months.”

Later it was confirmed he had been detained until 4 January 2019 pending further investigations.

The accused waved to the camera as he was taken into court handcuffed to a police officer.

He also won disturbing social media plaudits and was hailed as a “hero” for killing the lovers.

The extraordinary comments included:

“Well done, brother! I would have done just the same”.

“Cheer up, you will go to jail, this is true, but you have done the absolutely right thing”

“Don’t regret it, don’t mind police and other bureaucrats, you are the hero. You are a true man”

Kirkunov had a license for the Saiga rifle which is seen lying on the floor of his home after the double shooting.

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Victim Evgeny, a power station engineer, was married to a woman called Faina.