A bomb planted in a graveyard in eastern Afghanistan killed 14 members of a single family on Thursday as the country’s president urged the Taliban to lay down their arms. The family was getting together to mark the start of a major Muslim holiday, the Eid al-Fitr with a visit to the tomb of a relative. In Afghanistan, it is customary for families to visit the graves of loved ones on holiday occasions. The attack took place in Nangarhar province’s Ghany Khel district and all 14 killed — seven women and seven children — were members of the same extended family, said Masum Khan Hashimi, the province’s deputy police chief. No one immediately claimed responsibility for the bombing, it’s unclear why the family was targeted.