At least four students were killed and dozens more wounded Tuesday when a bomb exploded during a class at their religious school in Pakistan, officials said. "The blast took place in a seminary during a Koran class. Someone took a bag inside the seminary. At least four seminary students have been killed and 34 wounded," Waqar Azim, a senior police official, told AFP. Mohammad Ali Gandapur, another senior police official, confirmed the blast and details. He said two teachers were among the wounded. str-sjd-wat/jah