Apparently the Oerlikon GDF-005 anti-aircraft gun robot went berserk and killed 9 members of the South African National Defense Force before it was finally shut down.

I've said it before and I'll say it again, Robots don't like us.
The World As I See It Today.
Robots have been roaming the streets of Iraq, since shortly after the war began. Now, for the first time -- the first time in any warzone -- the machines are carrying guns.Fear the future my friends and hope that Governor Schwarzenegger is in fact a human and not some killing machine from the future here to recruit our ATMs and George Forman Grills to his cause.
After years of development, three "special weapons observation remote reconnaissance direct action system" (SWORDS) robots have deployed to Iraq, armed with M249 machine guns. The 'bots "haven't fired their weapons yet," Michael Zecca, the SWORDS program manager, tells DANGER ROOM. "But that'll be happening soon."