A DELTA co-pilot has been taken into custody, with officers allegedly seen entering the cockpit after the aircraft touched down. 

Around 10 agents, including some from Homeland Security, entered the aircraft after its arrival at San Francisco airport on Saturday. 

The flight had departed from Minneapolis airport earlier that day, as detailed by the ABC affiliate KGO-TV. 

Travelers were preparing to disembark when they saw the commotion at the front of the plane.

“We were all shocked and stunned. What was happening?” one passenger, known as Sarah, said.

Sarah documented what unfolded on board the aircraft.

“They barged through and stormed the cockpit,” she said.

“They removed the co-pilot, cuffed him, presumably arrested him.”

Sarah said the co-pilot was then flanked by officers, walked down the aisle, and taken off the plane.