A bomb detonated at a packed mosque in northern Afghanistan and killed or wounded at least 100 people

• A bomb detonated at a crowded mosque in northern Afghanistan on Friday.
• Scores of Shiite Muslim worshippers were left dead or wounded, according to multiple reports.

A bomb detonated at a crowded mosque in northern Afghanistan on Friday and left scores dead and wounded, according to multiple reports.

The blast targeted Shiite Muslim worshippers in the city of Kunduz, and the Islamic State's Khorasan branch claimed responsibility, according to a tweet from CBS journalist Ahmad Mukhtar.

Afghanistan's Islamic State faction, also known as ISIS-K, has a history of attacking members of the Shiite minority, the Associated Press reported.

The exact death toll was not immediately known. AP reported that at least 100 people were killed our wounded in the attack.

Sky News reported that at least 46 people were killed and over 140 were wounded, citing the state-run Bakhtar news agency.

"This afternoon, an explosion took place in a mosque of our Shiite compatriots in the Khan Abad district of Bandar, the capital of Kunduz province, as a result of which a number of our compatriots were martyred and wounded," Taliban spokesman Zabihullah Mujahid tweeted.

Mujahid said an investigation was underway.

"I assure our Shiite brothers that the Taliban are prepared to ensure their safety," Dost Mohammad Obaida, deputy police chief for Kunduz province, told the AP.

According to the AP, if confirmed, the death toll would be the highest since an August terrorist attack by the same Islamic State branch outside the Kabul airport killed 169 Afghans and 13 US service members.

This story is developing. Please check back for updates.