CAIRO - Nine people, including six policemen, were killed on Thursday in a Cairo suburb near the pyramids when a makeshift bomb went off as police prepared to raid a militant hideout, security sources said.

The Interior Ministry said in a statement that its security forces had arrived in their vehicles to raid an apartment and found the building booby-trapped. The device off when they tried to defuse it. Ten people were wounded, the sources said. The militants have stepped up attacks on Egyptian soldiers and police since the army toppled president Mohammed Mursi of the Muslim Brotherhood in 2013 after mass protests against his rule. Civilians have also been killed. The interior ministry blamed Thursday's incident on the blacklisted Muslim Brotherhood movement of ousted president Mohamed Morsi. "Police had information that a group of Muslim Brotherhood members were preparing to carry out aggressive acts in the coming days using explosives and crude bombs," the ministry said on its Facebook page.

"This group was using an apartment in a Cairo building, and on Thursday night the police raided this apartment where they found a number of crude bombs.

"When the bomb squad expert were dealing with one of the bombs, it exploded killing three policemen, one civilian and two unidentified men."