A man accused of shooting dead two people in a border village in a dispute over a house sale did not have a licence for the alleged murder weapon, AD reported on Wednesday.

Richard K. is suspected of killing a 38-year-old Polish man named as Sam and a 44-year-old woman named as Ineke in Weiteveen, Drenthe, on January 16. Prosecutors say he used several weapons in a pre-planned attack.

K., 50, from Klazienaveen, had a gun licence for sports and hunting, but owned other weapons that were not registered or declared to the police, AD said.

Local media reported that the incident was the culmination of a year-long dispute over the sale of K.’s parents’ house in the village.

He is reported to have killed Ineke while she sat in a car outside the house before shooting Sam in front of his 12-year-old son.

Gun ownership is strictly controlled in the Netherlands and licenses can be revoked if a person’s behaviour raises concern. Reports said both victims had complained about being harassed and threatened by K. in the months before the shootings.

Two days before the fatal incident police detained Sam after he came to blows with K. in a confrontation at the house. He said at the time he was worried that K. wanted to kill him, AD reported.