Egypt: Six police wounded in twin Cairo bomb attacks
Six police officers have been wounded after two bombs went off in Cairo, the Egyptian health ministry says.
The blasts were heard at around 09:45 local time (07:45 GMT) in the Giza area and were around two minutes apart.
Local media report that the bombs targeted police vehicles stationed near a bridge.
Armed groups have stepped up their attacks in Egypt since the ousting of President Mohamed Morsi by the military in July last year.
A BBC journalist at the scene says there is little obvious damage to the area.
The attacks took place in Giza Square, a regular route for marches against the current government.
Anti-military protests are expected in parts of the capital later, after Friday prayers.
The current government has outlawed the Muslim Brotherhood, declaring it a terrorist organisation. It accuses the movement of supporting attacks against the police and army - a claim the Brotherhood strongly denies.
Since Mr Morsi's overthrow, more than 1,000 people have been killed and thousands of members of the Muslim Brotherhood - where the ousted leader hails from - have been detained in a crackdown by the interim authorities.