The Downtown Pittsburgh skyline as seen from the 31st Street Bridge.
Two carjacking suspects were arrested Monday afternoon after crashing the vehicle police said they stole and trying to run from authorities — triggering a manhunt that shut down the 31st Street Bridge and snarled traffic on nearby Route 28.
Stowe police reported a carjacking around 3 p.m. and called in backup from other agencies during a subsequent car chase, authorities said…