Seoul's military warned Thursday that North Korean landmines in the DMZ may have washed across the border after heavy rainfall. In this photo, water from the Imjin River is released from Gunnam Dam on Tuesday. Photo by Yonhap

SEOUL, July 23 (UPI) -- South Korea's Joint Chiefs of Staff on Thursday warned that landmines laid by North Korea in the Demilitarized Zone may have been washed into the South after recent heavy rainfall.

"There is a very high possibility that these washed-away landmines could flow into our territory via the rivers shared between the two Koreas, and an explosion of these landmines could cause significant damage," JCS spokesman Capt. Jang Do-young said during a regular press briefing.

Jang urged the public to be cautious when near inter-Korean rivers and to report any suspected landmine to police or a nearby military unit.

The alert comes days after South Korean authorities issued a flood warning for the Imjin River following heavy downpours and North Korea's release of water from a dam without advance notice.