Two roadside bomb explosions Tuesday killed a Pakistan army soldier and a tribal elder and wounded eight others in the South Waziristan tribal agency, bordering Afghanistan, said security officials. A military vehicle on way to Wana, main headquarters of South Waziristan agency, hit a roadside bomb near Shakai town, 30 kilometers from Wana, officials told KUNA. Explosion killed a soldier and wounded five others, said the official, adding, it completely damaged the vehicle.In a related incident a pro-government tribal elder and chief of tribal Lashkar (force) was killed in remote-controlled device explosion near Shakai market, officials said further. They said two tribal elders and a security guard were also wounded. It was not immediate clear who had planted the bomb but Islamic militants have been blamed for targeting security forces, government officials and tribal elders believed to be cooperating with authorities in the hunt for militants in the region bordering Afghanistan. Security officials have said Arab, Central Asian and Afghan militants are in the area.