The Taliban announced the killing of several people, in an explosion targeting a mosque in the Afghan capital, Kabul.
Another 20 people were injured in the blast, which took place near the Eid Gah mosque, where funeral prayers were held for the mother of Taliban spokesman Zabihullah Mujahid.
This is the first major explosion in Kabul since the withdrawal of Western forces last August.
Hours later, the Taliban launched attacks on suspected ISIS hideouts.
It was reported that three suspected ISIS fighters were killed during the Taliban operation, but these reports have not been verified.
No group has claimed responsibility for the attack so far, but ISIS recently said that it carried out several bombings in the eastern city of Jalalabad.
The Islamic group strongly opposes the Taliban, which regained full control of Afghanistan in a lightning attack as international forces began to withdraw.
Taliban leaders are under pressure from the international community to abandon ties with the Islamic State and al-Qaeda, while consistently denying the presence of militants from either group in the country.
While the attack took place outside the mosque, it was not clear whether the funeral of the Taliban official’s mother, Zabihullah Mujahid, was directly targeted.
Mujahid became one of the group’s most public faces as its spokesperson.
Mujahid worked in the shadows for years, talking only to reporters on the phone. But since the Taliban seized power, he has addressed the media at several public press conferences.
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