A passenger bus slid off a mountain road in heavy rain on Sunday in Dana Sar, Khyber Pakhtunkhwa province, Pakistan, killing at least 20 people and injuring 13 others. About 35 passengers were traveling on the bus. Deadly road accidents are common in Pakistan due to poor road infrastructure, disregard for traffic laws and poorly maintained vehicles. Last month, 22 people were killed in a similar accident when a bus fell into a ravine in the Qila Saifullah district.