Egypt's state-run news agency said gunmen had attacked a three-car police convoy on the main Cairo-to-Fayoum road killing one policeman and injuring three others.
MENA quoted an Interior Ministry statement late Thursday as saying the gunmen fired at the last car from plantation land alongside the road.
Fayoum, an oasis province southwest of Cairo, is considered by security authorities as a traditional stronghold of the Muslim Brotherhood.
Insurgents had carried out a number of attacks in Egypt since the 2013 military ouster of an elected Islamist president. The violence has been concentrated in the northern Sinai Peninsula, but there had also been several attacks on the mainland, including the capital.
The attack came one day after the US urged Americans to consider the risks of travel to Egypt.
Source: News Agencies, Edited by website team