An Egyptian policeman was killed by a roadside explosive near the Cairo suburb on Sunday, the Egyptian Interior Ministry said in a statement.
An improvised explosive device planted on the roadside went off shortly after midnight as a military vehicle passed by, killing one police officer and injuring four others, according to the statement.
An initial examination suggested the bomb was detonated remotely by a mobile phone SIM card.
There was no immediate claim of responsibility by any group.
Egypt has been fighting a wave of anti-security attacks following the ouster of former Islamist leader Morsi in 2013.
Those attacks, which were mainly centered in Sinai while rarely happened in Cairo, have killed hundreds of soldiers and policemen.