At about 1.30pm on Friday, the unit, whilst on routine patrol, came across three men acting suspiciously.
When the Mobile Squad unit stopped to check on them, all three made a dash for it. The MS13 members pursued on foot and apprehended one of them.
The suspect, from Eastern Highlands, had in his possession a homemade gun, two live bullets and a hood. Upon questioning, he revealed that he and the other two were planning to carry out an armed hold up on vehicles travelling the highway.