QUETTA, Pakistan - A bicycle bomb exploded outside a police barracks in PakistanÂ’s southwestern city of Quetta on Saturday, killing at least one person and wounding a dozen, security and hospital officials said. Deputy administrator of the capital of the gas rich but violence-racked Baluchistan province, Manzoor Kakar, said the bomb had been planted in a bicycle.Doctors at the state run hospital where the wounded were taken said two of the casualties were in a critical condition.