Sudan: Armed men ambush Darfur peacekeepers, two killed

Armed men ambushed U.N.-African Union peacekeepers in Darfur on Friday, killing two soldiers and seriously injuring three in Sudan's troubled west, the latest in a wave of attacks on the under-equipped force. Separately Darfur's main rebel group said on Friday it had clashed twice with government troops in the past three days, warning more attacks would mean "all-out war" and the collapse of a fragile peace process.