Human rights investigator Jean Ziegler said they had driven people out of insurgent strongholds that were about to be attacked by cutting supplies.From BBC NewsA senior United Nations official has accused US-led coalition troops of depriving Iraqi civilians of food and water in breach of humanitarian law.
Mr Ziegler, a Swiss-born sociologist, said such tactics were in breach of international law.
A US military spokesman in Baghdad denied the allegations.
"A drama is taking place in total silence in Iraq, where the coalition's occupying forces are using hunger and deprivation of water as a weapon of war against the civilian population," Mr Ziegler told a press conference in Geneva.
He said coalition forces were using "starvation of civilians as a method of warfare."
"This is a flagrant violation of international law," he added.
