The officials further added that the militants had precise information regarding the IOM compound and the attack was well organized.
Five Taliban suicide bombers stormed the IOM office on Friday in the fourth district of capital Kabul which triggered heavy clashes that lasted for almost seven hours.
Richard Danziger, Chief of Mission of the IOM in Afghanistan said at least five staff of IOM along with five security guards were injured following the attack on Friday.
While responding to a question regarding the involvement of any IOM individual for plotting the attack with Taliban, Richar Danziger said investigations are still in process and IOM was not informed of the attack before.
He said the type of attack, targets hit during the attack and the directions which were used to carry out the attack shows that IOM office was the main target of militants since they had information regarding the compound.
An IOM employee was critical and has been sent abroad for treatment, Richard Danziger said adding that the IOM compound has suffered severe damage and most parts of it was burnt during the attack.
An Afghan police officer, two civilians and five suicide bombers were killed in Friday’s attack, and 17 others were injured.
Richard Danziger also said that such attacks will have no affect on their operation and they will shift their office to another location.
Taliban group claimed responsibility behind the incident and said a Central Intelligence Agency (CIA) guesthouse was the main target of the suicide bombers.