Several people have been killed in a shooting in the Swiss town of Wuerenlingen, north-west of Zurich, police say.

Officers came to the scene after gunfire was heard at a residential building overnight.

They found bodies lying both inside and outside the building. All are reported to be adults.

The circumstances of the shooting and identities of the victims are unclear. An investigation is under way.

Wuerenlingen, a German-speaking town of some 4,000 people, is located about 30km (20 miles) from Zurich.

(BBC)