UNITED NEWS INTERNATIONAL (UNI) — The fatal mission in Niger last year that left four American soldiers dead was not approved by senior command.

According to the Associated Press, a U.S. Army Special Forces team was sent out to meet local Nigerien leaders, for which they were properly equipped and prepared.

However, the team instead decided to set out on a risky mission to capture a high-level Islamic State militant without informing their commanders.

The soldiers were ambushed by nearly 100 Islamic State militants in a remote area more than 120 miles north of Niger’s capital city.

Four U.S. soldiers and four Nigerien troops were killed. Two other American soldiers and eight Nigerien forces were also wounded.

Officials say there is no single point of failure in the operation. However, questions remain about whether higher-level commanders — if told — would have approved the mission.