The North's Defence Minister Kim Yong-Chun and military chief Ri Yong-Ho toured the border truce village of Panmunjom on March 4, Yonhap news agency quoted an unidentified South Korean military official as saying. The official also said mid-level officials had since travelled to the village and vehicles carrying oil, food and other supplies were sighted in the area. US and South Korean military officials had no comment on the report. The communist country's new leader Kim Jong-Un on March 3 made a surprise inspection visit to the village, which straddles the border, and placed troops there on alert. Kim has made a series of trips to frontline military units since the death of his father Kim Jong-Il on December 17. Pyongyang's new leaders have agreed a nuclear deal with the United States but have taken a consistently hostile tone with the South's conservative government and its President, Lee Myung-Bak. The North has several times threatened to launch a "sacred" war against the South over what it sees as Seoul's insults to new leader Kim and his late father. A defence ministry spokesman confirmed media reports that a South Korean military unit based at Incheon west of Seoul had posted photos of the two Kims inside a barracks, with messages reading "Let's beat Kim Jong-Il to death! Let's strike Kim Jong-Un to death!" The spokesman declined to say whether the photos or messages were still on display, saying such matters were the responsibility of individual units. South Korea, which blames its neighbour for two deadly border incidents in 2010, has vowed to hit back hard for any future attacks.