Two persons of interest were taken into custody Thursday in Philadelphia.
Sources say the two had a number of expensive jewelry items in their possession when they are apprehended.
Investigators are now working to see if the pair is linked to Wednesday's robbery at Tourneau, Inc., a fine watch store located in the Plaza at the King of Prussia Mall.
It happened just before 3:00 p.m.
Upper Merion Police say three men walked into the store and threatened the security guard with a small sledge hammer.
One man then used the hammer to smash the glass display cases. The other two removed numerous watches from the cases. All three then fled.
Police say the robbery lasted less than 20 seconds.
No one was hurt.
The same store was robbed last summer in a similar kind of heist.
It happened on July 13th, 2011.
The thieves in that heist got away with 18 Rolex watches worth $576,700 after ordering people to the ground and smashing a case with a hammer.
Upper Merion Police ask that anyone with information on Wednesday's robbery call detectives at 610-265-3232.