The Muslim Brotherhood said on Monday that the death of former Egyptian President Mohamed Mursi on Monday was a "full-fledged murder" and called on Egyptians to gather for a mass funeral.
In a statement on its website, the Brotherhood also called for crowds to gather outside Egyptian embassies around the world.
Mursi, the first democratically elected head of state in Egypt's modern history, died aged 67 after collapsing in a Cairo court while on trial on espionage charges, authorities said.
Mohammed Sudan, leading member of the Muslim Brotherhood in London, said Morsi was banned from receiving medicine or visits and there was little information about his health condition. "This is premeditated murder. This is slow death."
Morsi was held in a special wing in Tora nicknamed Scorpion Prison. Rights groups say its poor conditions fall far below Egyptian and international standards. Morsi was known to suffer from diabetes.
Sarah Leah Whitson, Middle East director with the Human Rights Watch, said in a tweet that Morsi's death was "terrible but entirely predictable" given the government "failure to allow him adequate medical care, much less family visits."
