Sweden's right-wing government said on Friday it would seek to tighten gun laws in the wake of the country's deadliest mass shooting at an adult education centre where the attacker appeared to have used several of his own licensed rifles.

The government says it is seeking to strengthen vetting for gun licenses and restrict access to semi-automatic weapons.

Swedish police say about 10 people have been killed in a shooting at a school for adults in the city of Orebro, including the suspected gunman.