Norwegian police continued on Sunday to hunt for the four people who robbed a goldsmith store in Oslo, capital of Norway, on Saturday.

But no arrests have been reported about 20 hours after the robbery, which occurred about 12 o'clock (1100 GMT) Saturday at the Sheikh enterprises located in the Groenland area of Oslo.

The video footage released by police on Saturday night, showed customers fleeing out while four masked robbers attacked inside the shop with crowbar and filled their bags with loot.

The four masked men escaped in a Swedish-registered Audi A3, which was set on fire soon after a few hundred meters away from the shop.

Police now assumed that the robbers changed into a black BMW to flee.

Two to three shots were heard while the robbery was going on. But nobody was injured.

The Sheikh family own several jewelry shops in Oslo.

It was the second time that the same shop was robbed in nearly five years.

On July 30, 2009, a group of robbers ran from the shop with three large hockey bags full of gold.

A few months later, another gold shop owned by the family in the city was attacked.

Only one perpetrator was arrested and persecuted subsequently for being involved in one of the robberies.