Syrians "must choose between surrender and starvation"Listen /
More than 250,000 people who are living in besieged cities in Syria are being forced to choose between surrender and starvation.
That's according to the Commission of Inquiry on Syria which is due to report to the UN Human Rights Council in Geneva on Tuesday.
Syria has been at civil war for the past three years.
Over 100,000 people have been killed and nine million are in need of humanitarian aid.
The report, which covers the period between July 2013 and January 2014, says that Siege warfare is employed in a context of what it calls "egregious human rights and international humanitarian law violations."
It adds that government forces and allied militia continue to conduct widespread attacks on civilians, systematically committing murder, torture, rape and enforced disappearance.
The rebel opposition are also condemned for committing war crimes, including murder, executions, torture, hostage-taking and the recruitment of children.
The Independent International Commission of Inquiry was established in August 2011 by the UN Human Rights Council
Jocelyne Sambira, United Nations.