At least 23 peshmerga and militia fighters were killed and dozens were wounded in Sunday’s fighting.
Paktia provincial spokesman Mukhles Afghan said at least 50 more were wounded in the attack.
Reports say that as many as 140 South Africans have travelled to Syria to join ISIS.
The US, Britain, France, Germany, Russia and China began a final round of talks with Iran on Tuesday.
The United States and the European Union have imposed sanctions on Russia over its annexation.
Police have denied claims they caused the stampede that killed 11 people and injured over 50 others.