Russia, China and Iran are complicit in a \"massacre\" being carried out by regime forces in Syria, the Muslim Brotherhood charged on Monday. \"We consider Russia, China and Iran as direct accomplices to the horrible massacre being carried out against our people,\" the group, which is banned in Syria, said in a statement issued from London. It accused the three countries of supplying weapons and equipment to the embattled regime in Damascus, which is seeking to put down an 11-month revolt. By doing so, the Brotherhood said, they were \"directly participating in the massacre of our defenceless people.\" According to rights groups, more than 6,000 people have been killed in the unrest that broke out when activists launched a popular uprising in Syria in mid-March.