Macedonian police say they have arrested a man suspected in ax murders of four elderly women.

Interior Minister Gordana Jankulovska says the 28-year-old drug addict allegedly tried to kill another three women before his arrest on Saturday.

Jankulovska said Monday the authorities see this as a serial killer case.

She identified the suspect as Viktor Karamarkov, who apparently picked elderly victims at random. Karamarkov would show up at the victim's door begging for money for his supposedly ill mother, and then hit them on the head with a foil-wrapped ax before taking their jewelry.

Police said Karamarkov's alleged victims, aged between 69 and 83-years-old, were killed between March and October