French Muslim war graves defaced

A pig's head was hung from one headstone and slogans insulting Islam and France's Muslim justice minister were daubed on other graves.

President Nicolas Sarkozy condemned the attack as a "hateful act" and the "most inadmissible kind of racism".

About 78,000 colonial subjects of France, including many Muslims from North Africa, died in the war.

The Notre Dame de Lorette war cemetery, near Arras in northern France, is on the site of some of WWI's largest battles.

About 100 police officers have been sent to the cemetery to investigate the incident.