A Cairo prosecution on Monday launched extensive investigations into Sunday violent clashes in Mataria district which claimed the lives of 21 persons.
Some 43 rioters of the terrorist Muslim Brotherhood are accused of plotting for the clashes which left scores of casualties in conjunction with the fourth anniversary of the January 25 revolution.
The prosecution called on the National Security and Criminal Investigation departments to provide needed investigations about crimes committed by the defendants.
Prosecution teams moved to various scenes to examine the dead bodies and ordered the forensic doctors to carry out autopsies and determine the causes of death.