Egyptian police have arrested two suspects in the murder of Italian student Giulio Regeni, the German news agency DPA quoted a security official as saying on Friday.
"The security agencies have reached important clues in this case, showing that the incident is a criminal act unrelated to terrorism," the official, speaking on condition of anonymity, was cited as telling DPA.
"Details of these clues will be disclosed within hours," the official said without elaborating. He did not state the nationality of the suspects.
Regeni was found dead in a ditch on Wednesday on a highway on the outskirts of Cairo, more than a week after he disappeared. His half-naked corpse showed signs of torture.
The Cambridge University doctoral student vanished on 25 January on his way to meet a friend in the centre of the city. He had been in Cairo since September to do research on trade unions since the 2011 uprising and fall of longtime ruler Hosni Mubarak.
Seven police officers were due on Friday to travel to Egypt to join investigations into the mysterious death of the 28-year-old.
Italy has requested Egypt's maximum cooperation bringing Regeni's killers to justice and president Abdel Fattah al-Sisi has assured Italian premier Matteo Renzi its authorities will make "make every effort".
Regeni arrive on Saturday at Rome's Fiumicino airport and to undergo an autopsy and toxicology tests at La Sapienza university's legal medicine department, Italian prosecutors said.
A sit-in in support of Regeni has been organised outside the Italian embassy in Cairo on Saturday at 4pm local time.
"Giulio Regeni is one of us. He died as one of us," the sit-in organisers wrote on the Facebook page 'RIP Giulio'.
"He was kidnapped, tortured and killed like many other Egyptians".