Two low-ranking policemen were killed in Upper Egypt's Minya on Sunday, the interior ministry said in a statement.
The policemen, Ahmed Asnai and Mohamed Mahfouz, were shot while standing on a road and then fell into an adjacent water channel, the statement said. Police forces were dispatched to track down the shooters.
On Saturday, a police officer was killed in a similar way in the Nile Delta governorate of Sharqiya.
Hundreds of police and military personnel have been killed since the army's popularly-backed ouster of president Mohamed Morsi last July.
The militant Islamist group Ansar Beit Al Maqdis has claimed responsibility for most of the major attacks against police and military targets.

Police in Sinai are often targeted by the Egypt-based militant Islamist gorup Ansar Beit Al Maqdis (File Archive/AFP)