Both players tested positive for COVID-19 while on international duty with Egypt.
Salah had to miss Egypt's AFCON qualification games against Togo.
Neither is expected to be available for their respective club at the weekend, as they have not yet returned a negative COVID-19 test.
The Egyptian Football Association said of the matter on their official website: "Salah and Mohamed Elneny, the stars of the professional national team in England, would travel tomorrow from Hurghada airport on a private plane equipped with medical equipment, hoping that their cases would soon turn negative and be able to return to the participation of their two teams in their next matches.
"The Egyptian Federation has been in constant contact and coordination with the two clubs since each of them was infected with the Coronavirus, and communication was made through Captain Mohamed Fadl, a member of the five-year committee in charge of managing the Federation's affairs at the administrative level, and Dr. Muhammad Abu Al-Ela, the doctor of the national team at the medical level, while the two players made a new swab for each."
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