S. Sudan minister quits, rejoins Machar's rebels

South Sudan's labour minister resigned Friday and declared allegiance to rebel leader Riek Machar, making him the second top official to quit in the war-torn country this week.Gabriel Duop Lam, who joined a unity government last year as a member of Machar's opposition, did not give a reason for his resignation in a statement released to the press, but declared his "full allegiance and commitment" to the exiled rebel.Information Minister Michael Makuei confirmed to AFP that Lam as well as his dep