CAIRO, Oct. 28 (Xinhua) -- Three policemen were killed in the early hours of Monday during attack by unknown militants in Egypt' s Delta city of Mansoura, state-run Ahram website reported.
In the wee hours of Monday, four masked unknown militants on a motorcycle attacked the security forces in the Mansoura university check point, and fired randomly at the policemen, Ahram quoted official sources as saying.
He added three policemen were killed and several others were wounded in the accident.
The suspects fled the scene and the security forces were intensified in the vicinity of the Mansoura University and the security headquarters.
The preliminary investigations showed that more than 60 used bullets were found in the checkpoint after the attack.
The army and police premises have being under assault since the ouster of the president Mohamed Morsi by the army on July 3. The interior minister survived an assassination attack last month near his house, then a hardline group, Ansar bet el-Maqdis claimed responsibility for the accident and other attacks over army soldiers in restive Sinai.
In a similar accident last week, gunmen opened fire on a group of wedding guests outside a Christian church in Egypt's capital of Cairo, killing at least four and wounding 12 others.