A bus carrying over 50 wedding guests met with an accident in Pakistan's Sindh province on Tuesday, leaving at least six people dead and 40 injured, the media reported.The injured people including women and kids have been shifted to a nearby hospital where several of them were said to be in critical condition, Dunya reported.Road accidents happen in Pakistan mainly due to poorly maintained vehicles, dilapidated roads and negligence of road safety measures.Traffic police officials say most of the accidents happen in the country mainly due to human error.According to the latest figures available with the Pakistan Bureau of Statistics, road accidents killed an average 15 people every day across the country over a decade from 2005 to 2015.