(KUNA) -- At least seven persons were wounded Wednesday when their vehicle hit a landmine in Southwestern Baluchistan province of Pakistan, said officials. The incident took place in Killi Madd area, about 15 kilometers from gas-rich Sui district, said police sources. They said the landmine had been planted by suspected nationalist militants to target security forces vehicle, which was to pass from there after few minutes. They added that the explosion wounded seven persons, adding that two of them are said to be in critical condition.Nationalist militants frequently target security personnel in Baluchistan province to pressurize the government to heed to their demand of maximum provincial autonomy.