On March 25, Cairo announced police had killed four members of a criminal gang specialising in abducting foreigners, and that they had found Regeni's passport in the apartment of a sister of one of the slain suspects.
Rome has cast doubt so far on Cairo's explanation for Regeni's murder, with Foreign Minister Paolo Gentiloni tweeting "Italy insists: we want the truth."
The Italian media and Western diplomatic sources in Cairo suspect that elements from the Egyptian security services were behind the 28-year-old PhD student's murder.
"A delegation of members from the general prosecution office and policemen involved in the investigation of the killing of Italian citizen Giulio Regeni will leave Cairo tomorrow, April 6," the Egyptian prosecution's office said.
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The team led by deputy general prosecutor Mostafa Suleiman "will present the results of the investigation conducted by the Egyptian general prosecution in the case so far", it said in a statement.
The delegation was initially scheduled to head to Rome day, but the trip was delayed for undisclosed reasons.
Regeni disappeared in central Cairo on January 25, and his body was found nine days later on the side of a motorway, badly mutilated and showing signs of torture.