The inter-Korean border area / Yonhap

A North Korean man was taken into custody after crossing into South Korea via the eastern border, the Joint Chiefs of Staff (JCS) said Wednesday, amid a possibility that he could have sought to defect to the South.

The man, whose identity was withheld, was captured about 10 hours after he crossed the border in the eastern county of Goseong late Tuesday. His crossing was detected on the South's surveillance equipment, prompting the military to launch extensive search operations.

"Our military safely captured the man at around 9:50 a.m. In coordination with related authorities, we will carry out investigation into the man, including how he crossed the border and if he has the intention to defect to the South," the JCS said in a statement.

"No unusual moves by the North Korean military have been detected," the military added.