People walk in front of the Residenzschloss, Residence Palace, a day after thieves broke into the Green Vault at the building, one of the world’s oldest museums, in Dresden, Germany. Picture: Sebastian Kahnert/dpa via AP

Dresden, Germany - German police were back at a Dresden museum on Tuesday scouring for clues, a day after thieves made off with a haul of jewellery from an 18th century royal collection.

"The work continues today," a spokesman said.

Police do not yet have a solid lead in the case and the search goes on for the perpetrators, he added. More information on the status of the investigation is expected to be released in the afternoon.

Two unidentified suspects broke into the Green Vault museum early on Monday and managed to steal parts of three jewellery sets studded with diamonds, despite stringent security measures.

Up to 100 objects may have been stolen from the sets, which consist of clasps, buttons, medals, epaulettes, sashes and ornaments for hats and canes, decorated with diamonds, emeralds, rubies and sapphires.

A piece of jewellery stolen during a robbery from the Green Vault city palace in Dresden is seen in an undated photo provided by the Saxony state police. Picture: Polizeidirektion Dresden/Handout via Reuters

The value of the stolen goods is impossible to calculate, museum officials have said.

The suspects entered the building through a window after cutting through a grid and breaking the glass. They used an axe to smash the glass case containing the jewels, according to police.

A piece of jewellery stolen during a robbery from the Green Vault city palace in Dresden is seen in an undated photo provided by the Saxony state police. Picture: Polizeidirektion Dresden/Handout via Reuters

The Green Vault houses one of Europe's oldest and best-preserved collection of treasures.

Police investigators walk in front of latticed windows of the Green Vault at the Residenzschloss, Residence Palace, a day after thieves broke into the Green Vault, one of the world’s oldest museums, in Dresden, Germany. Picture: Sebastian Kahnert/dpa via AP

The treasury was created between 1723 and 1730 at the behest of Augustus the Strong, the elector of Saxony. Competing with Louis XIV, he had sought to outshine the Sun King with his impressive array of jewels.

dpa