March 23 (UPI) — A Colombian Air Force C-130 Hercules aircraft crashed Monday in the southern department of Putumayo while transporting military personnel, with the number of casualties still unknown, authorities said.

Defense Minister Pedro Sánchez confirmed the accident and said the cause remains under investigation. Initial reports indicate the aircraft was carrying about 100 people, including members of Colombia’s armed forces and National Police.

“Military units are already at the scene; however, the number of victims and the causes of the accident have not yet been precisely determined,” Sánchez said on X.

Gen. Carlos Silva, commander of the Colombian Aerospace Force, said the aircraft was carrying “114 passengers on board and 11 crew members.” He also said that “48 injured people have already been rescued,” though he cautioned that the figure is preliminary, France24 reported.

A witness at the crash site told local radio station La FM that several injured people had been evacuated.

“We are in a rural area where the plane went down and we are collecting the injured. About 10 to 15 people have been taken out. We are transporting them in police vehicles and local residents are helping move people on motorcycles,” the witness said.

Early reports indicate the aircraft may have experienced difficulties during takeoff and failed to gain proper altitude, according to Noticias Caracol.

The aircraft, identified as FAC 1016, was carrying troops from the Army’s 27th Jungle Brigade. The personnel were traveling from Puerto Leguízamo to Puerto Asís as part of a troop rotation, and the plane was expected to return to Bogotá.

President Gustavo Petro addressed the incident on X, expressing concern over possible casualties.

“I hope we do not have deaths in this horrific accident that should not have happened,” Petro said.

He added that his administration has sought to modernize the military’s equipment but has faced bureaucratic obstacles.

“If civilian or military administrative officials are not up to this challenge, they must be removed,” he said.

Petro also said his government has worked to modernize the country’s strategic air fleet and has requested the immediate purchase of helicopters and transport aircraft to expand troop mobility, particularly in regions affected by the grounding of Russian-made helicopters.

He said, contrary to some media reports, the military has been losing operational capacity for more than 15 years and that his administration is committed to fully modernizing its equipment.