Police announced the arrest on twitter.
Earlier, police said they had boosted the investigating team with more officers and results should be expected soon.
Police now have a picture of the case, suspects and motives, deputy chief Kypros Michaelides told reporters.
According to Michaelides, there are now 12 to 15 police investigators on the case.
He said there was no such thing as a perfect crime and he was optimistic the case would be...