CAIRO, June 30 (Xinhua) -- An Egyptian police officer was killed and three other security personnel injured in a blast near the presidential palace in eastern Cairo on Monday, State-run Ahram newspaper reported on its website.
Colonel Ahmed al-Ashmawi, a bomb disposal expert at Cairo security directorate, was killed while defusing one of two bombs planted near the Ittihadiya palace in Heliopolis district, the report added.
A security source was quoted by State-run Nile TV as saying that two bombs were discovered incidentally near a dust pin, while the bomb disposal team was combing the vicinity of the presidential places.
Later, another security man was wounded in defusing a third primitive explosive device outside the palace, TV added.
A little-known jihadist group, Ajnad Misr (Soldiers of Egypt), formally announced itself in January has also claimed a string of attacks on police in Cairo.
The group announced it had planted a series of bombs near the presidential palaces to target the security forces.
The blast came two days after another blast hit an unfinished telecommunications building of state-owned Telecom Egypt, the country's fixed-line monopoly operator, in the October city outside Cairo, killing a girl and her mother. The father of the killed girl is the guard.
On Wednesday at least six people were injured in small explosions near metro stations in the capital outskirts and outside a court complex also near the presidential palace.
Since the ouster of Islamist president Mohamed Morsi, a wave of militant attacks and explosions targeting security personnel and public institutions have risen mainly in the restive Sinai Peninsula. But recently, the attacks have crept into the capital and Delta cities.
Al-Qaida-inspired Ansar Bayt al-Maqdis claimed responsibility for most of the attacks, saying they were revenging for police crackdown on Morsi's supporters which left more than 1,000 dead.
The Monday blast came while the country marks the anniversary of toppling Morsi and his Brotherhood group following mass protests over his turbulent one-year in rule. It was not immediately clear if President Abdel Fattah al-Sisi, who led Morsi 's ouster, was at the palace at the time of explosion.
Security forces sealed off routes leading to iconic Tahrir Square, the epicenter of the 2011 popular uprising that toppled long-time ruler Hosni Mubarak. The square was closed and declared off-limits for the traffic in readiness for the celebrations.