The robbers wearing full-faced helmets and gloves struck the outlet at 2.42pm.
There were five workers at the counters during the incident.
The thieves escaped with jewellery worth about RM280,000 - Photo source RMP
Kuala Lumpur CID chief Datuk Zainuddin Ahmad said two of the robbers smashed the jewellery display showcase with a hammer and machete before escaping with two trays of jewellery.
The loot comprised mostly large and valuable rings.
