Dutch police have arrested a total of 13 people in two separate investigations into shootings in Oss in Brabant, and in Rotterdam.

In Oss, two men have been arrested after four separate houses in the town were shot at within a week. The two, from nearby Veghel, are 22 and 25 years old. Police found two guns as well as drugs during searches of their homes during the arrests.

The two are suspected of attempted murder, vandalism and threatening behaviour but their exact role in the shootings has not been made public.

No-one was injured in the shootings, but the violence may be connected to the murder of a  23-year-old man in Oss in April who was shot dead while riding his moped. Police have declined to comment on a possible link.

In Rotterdam, 11 suspects have been arrested in an investigation into shootings and explosions at a number of homes.

The wave of violence, thought to be drugs related, started in February. One of the 11 remains in custody. He was arrested on Monday and police found a quantity of drugs and thousands of euros in cash during a search of his home.

The other 10 were arrested in May and have since been released but remain suspects in the investigation.