JUBA: A minister in the government of South Sudan was shot dead inside his ministry Wednesday, days after referendum results confirmed the region will become Africa's newest independent state, the region's army said. South Sudan's Interior Minister Gier Chouang Aloung said the attacker was the minister's brother-in-law. “We want to make very clear there is no political motive whatsoever...it is a family issue... he was killed by his own brother-in-law.” South Sudan's army spokesman Philip Aguer said the Minister of Rural Development and Cooperatives, Jimmy Lemi, was shot dead inside the ministry in the heart of the region's capital Juba. “(The attacker) also killed a guard at the door of the ministry,” he said. Aguer said the attacker was under arrest. He had earlier said that the man had committed suicide. Officials said Lemi was a former member of the National Congress Party which dominates the north, who had defected to the south's ruling Sudan People's Liberation Movement ahead of April 2010 elections. Security forces had cleared away hundreds of onlookers from around the ministry. A government car with a window smashed was parked inside the building compound. “We...saw a man taking a gun out of the car – he ran inside and we heard three or four shots,” said one witness. An ambulance moved slowly away from the scene in a funeral procession, followed by dozens of wailing mourners. No motive was immediately clear for the attack, which underlines insecurity and the spread of arms in the region. Final results of a referendum on independence confirmed Monday that South Sudan will become the world's newest state on July 9.