South Korea has resumed live-fire artillery drills at a high-profile U.S. range just miles from the North Korean border for the first time in seven years, a move that highlights growing military tensions following the collapse of a landmark inter-Korean agreement.

The drill, held Monday at the U.S. Story Live-Fire Complex in Paju, represents one of Seoul’s most high-profile drills in recent months and comes after last year’s breakdown of the Comprehensive Military Agreement (CMA) aimed at reducing front-line tensions.

According to an army press statement released Tuesday, the drill mobilized six K55A1 self-propelled howitzers from the First Infantry Division