Berlin: A wild boar has gone on a rampage in a northern Berlin park, causing minor injuries to three people before being shot dead by police.

A sounder of boars showed up near the city's Tegel Airport about 2pm on Saturday before one of the male boars moved away from the group to a nearby park, local police said.

The boar then proceeded to attack a number of people, injuring a woman on her leg as well as two other men.

Police shot the animal dead, in order to prevent it from injuring any further passers-by. By that stage, the rest of the animals had already moved on, police said.

Meanwhile, in the western German city of Siegen, a wild boar disrupted traffic and smashed down the front door of a hairdressing salon on Saturday.

The animal was also eventually shot dead by the authorities.

AAP