CAIRO, June 30 (Xinhua) -- Two police officers were killed and several other security personnel were wounded in two blasts near the presidential palace in Cairo's Heliopolis district on Monday, State-run Ahram newspaper reported on its website.
Colonel Ahmed al-Ashmawi, a bomb disposal expert at Cairo security directorate, was killed and four other security men were injured while defusing one of two bombs planted in the crossroad of Marghany with Ahram streets in the vicinity of presidential palace in eastern Cairo, the report said, adding one bomb was successfully defused.
Later, another police lieutenant was killed when the third primitive bomb went off as security forces tried to defuse it near the presidential palace. Several security men were wounded and an officer was seriously injured.
Interior Minister Mohamed Ibrahim mourned the martyrs and said "the attacks will only increase police's determination to combat terrorism."
A security source was quoted by state TV as saying that the first two home-made bombs were discovered by incidentally near a dust pin, while the third one was planted near the wall of the places as the bomb disposal team was combing the vicinity of the presidential places.
No group has yet claimed responsibility for the attacks.
A jihadist group named Ajnad Misr (Soldiers of Egypt) has claimed a string of attacks on police in Cairo.
The explosion came two days after a blast hit a construction site of telecommunications building in the October City outside Cairo, killing a girl and her mother. The father of the killed girl was the guard of the building.
On Wednesday, at least six people were injured in small explosions near metro stations in the capital outskirts and outside a court complex 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 explosions 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 inside the palace at the time of explosion.