In a statement on Tuesday, Ahmad al-Raysun described the death of Mursi as a disgrace for “criminal seditionist” rulers of Saudi Arabia and the UAE “whose hands are stained with the blood of the people of Egypt, Libya, Yemen, Sudan and other Muslims.”
He added that it is also a disgrace for the leaders of Al-Azhar and Egyptian President Abdel Fattah el-Sisi.
Mursi was held in prison and tortured for six years, Raysun went on to say, according to ar.lesiteinfo.com website.
Mursi died on Monday at the age of 67.
He collapsed and died while attending a court hearing, Egyptian state media reported. He suffered a "sudden heart attack," state-run Ahram Gate said.
Egypt’s public prosecutor said there was no evidence of marks or injuries to his body but investigators would conduct a full autopsy and examine courthouse video for evidence.
Amnesty International urged a transparent probe into the circumstances of Mursi’s death, while other rights advocates seized on it as proof authorities were denying him proper medical care.