Three detainees held in a cell at the Shubra al-Keima police station fainted and later died on Tuesday as a result of very hot temperatures and overcrowding.
The victims included a suspect who detained over drug allegations. The bodies were transferred to the morgue.
According to police investigations, the three detainees were still alive when they were transport Nile Hospita, but later died.
Head of the Qaliubiya Security Directorate Major General Saeed Shalaby said he ordered that the number of detainees be reduced and that fans be installed in the cells.
Edited translation from Al-Masry Al-Youm