Mysterious 'tire traps' plague city streets as locals take matters into their own hands

A popular city has locals taking to the streets to help crack down on the "tire traps" that are scattered across busy roads.

Volunteers in Jakarta, Indonesia, have been picking up nails, threaded bolts and scraps of umbrella frames, according to The Associated Press (AP).

It is thought the mysterious sharp metal pieces are intentionally left by vandals to damage the tires of vehicles on main roads. 

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