Gen. John F. Campbell told lawmakers on Tuesday that the air attack at a hospital in northern Afghanistan, which resulted in the deaths of 22 people, did not mean to target the staff and patients there, saying it was "mistakenly struck."

"We would never intentionally target a protected medical facility," the commander of the U.S. and Allied Forces in the war-torn country said before the before the Senate Armed Services Committee.

The U.S. General added that his forces will go through "in-depth training" and go over the rules of engagement that regulate the mission in Afghanistan that is currently in progress, according to The Washington Post.

During his appearance before the committee, Campbell could not give additional details about what took place, specifically who missed the mark in avoiding the attack on hospitals.

The general added that he will wait for the results of the various investigations that have been conducted regarding the incident, according to the Portland Press Herald.

Campbell also urged U.S. President Barack Obama to make adjustments to his plan and retain more than 1000 American troops in the war-torn country beyond 2016.

The president had vowed to remove troops in the base before he leaves office in 2017 but Campbell argued that Afghanistan is still involved in violent conflicts and having just 1000 troops to train Afghan forces would be insufficient, according to the Chicago Tribune.