SEOUL -- Three civilians from the Republic of Korea (ROK) sent drones to the Democratic People's Republic of Korea (DPRK) four times since the inauguration of the current government, ROK's unification minister said Wednesday.

Unification Minister Chung Dong-young told a televised press briefing that the investigation results of the joint military-police investigative body revealed four drone infiltrations on Sept 27, Nov 16, Nov 22 last year and Jan. 4 this year.