At least 13 people were killed and 14 others wounded when a suicide bomber struck the home of a prominent politician in the eastern Afghan city of Jalalabad, authorities said.
The bombing marks the second deadly attack in the city since Wednesday, when self-styled Islamic State jihadists claimed responsibility for a deadly gun and bomb siege targeting the Pakistani consulate.
The latest attack came during a "jirga", an assembly of tribal leaders, at the home of politician Obaiduallah Shinwari, who escape unscathed.
Mr Shinwari is a well-known member of Nangarhar's provincial council and his family is said to be actively involved in local politics.
The violence comes amid renewed international efforts to revive peace talks with the Taliban, locked in a tussle for supremacy with the IS group in Afghanistan.
Last week representatives of Afghanistan, Pakistan, the United States and China met in a bid to revive stalled Taliban peace talks, even as the insurgents wage a brazen winter campaign of violence.
The so-called "roadmap" talks were meant to lay the groundwork for direct dialogue between the Afghan government and the Islamists to end the 14-year Taliban insurgency.
The four-country group is set to hold the next round of discussions on Monday in Kabul.