"A Ukrainian citizen has been killed in a terrorist attack on a hotel in Kabul. The consul of Ukraine is leaving for Kabul. Quick and coordinated action is required on the site of the incident," he tweeted.

Read alsoUkraine's Foreign Ministry: There could be Ukrainians among victims of attack on Kabul hotelAccording to CNN, gunmen raided the Intercontinental Hotel in Kabul, leaving six people dead after a 12-hour standoff with security forces that ended Sunday, Afghan authorities say.

A foreigner was among those killed before Afghan forces secured the hotel, according to Nasrat Rahimi, a deputy spokesman for the Interior Ministry, who did not provide additional details on the nationalities of the victims. Seven Afghans were wounded, he said.

Afghan security forces went on every floor of the six-story hotel in a clearing operation that left four attackers dead, ministry spokesman Najib Danish said.