SEOUL, South Korea (AP) — South Korean experts say two small drones believed to have been flown across the border by the North were crude and decidedly low-tech — equipped with cameras available on the Internet for hundreds of dollars — but underscore a potential new threat that must be taken seriously.

North Korea has recently been touting its drone program, a relatively new addition to its arsenal. It has prominently displayed large drone-like aircraft in military parades. According to the North’s state-run media, leader Kim Jong Un watched a drone attack drill on a simulated South Korean target last year.