Police opened an investigation into a suspected serial killer after the body of a suspected murder victim was discovered in the northern city of Ma’alot-Tarshiha bearing signs of violence, police said, the third unsolved murder in the town since 2015.

The ex-wife of the suspected murder victim arrived at his home Monday evening, but when she tried to enter the house the door was locked, according to Hebrew media reports.

When she returned the next morning she found the door open, and upon entering the house found her former husband lying dead in bed, leading her to contact police.

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The victim was described as a man in his 50s.

The man’s body was said to be badly beaten, reportedly resulting from being struck with a blunt object, while the house was in a state of disarray and the walls were covered in blood, Ynet reported.

The victim, whose name has not been released, was said to be handicapped and needed an electric scooter to move around. Neighbors reportedly described him as quiet and reserved.

According to Hebrew media reports, police are looking into a connection between the apparent murder and two other similar killings in 2015 and 2016 in Ma’alot-Tarshiha that remain unsolved.

The mixed Jewish-Arab city in northern Israel city is home to some 20,000 people.