Kabul, Afghanistan (CNN) Gunmen who raided the Intercontinental Hotel in Kabul killed at least 18 people during a 12-hour standoff with security forces that ended Sunday, Afghan authorities said.

Of those killed, 14 were foreign nationals and four were Afghans, according to Najib Danish, spokesman for the Ministry of Interior. Four gunmen were also killed by Afghan security forces responding to the attack, he said.

The slain included nine people from Ukraine and one person each from Greece, Germany and Kazakhstan, Kabul Police Chief Salem Ehsas said. The nationalities of two people were not known yet, he said. Ten people were injured, including four civilians, he said.

Afghan security forces went on every floor of the six-story hotel in a clearing operation, said Danish. He said four attackers were involved, but the Taliban released a statement claiming responsibility and saying it was carried out by five assailants.

Security forces near the Intercontinental Hotel after the attack.

The attackers were affiliated with the Pakistan-based Haqqani network, according to the Interior Ministry.

Read More