The incident reportedly took place in Shubra al-Khaima in northern suburbs of Cairo in the middle of the night.
— Egyptian Streets (@EgyptianStreets) August 20, 2015
At least eight people were injured, including six police officers, who have all been transferred to a hospital for treatment, local Al-Ahram daily reports, citing head of Egypt's ambulance authority Ahmed Ansary.
BREAKING| Official Ministry of Interior statement: six police officers injured in explosion. #Egypt— Egyptian Streets (@EgyptianStreets) August 20, 2015
"A man suddenly stopped his car in front of the state security building, jumped out of it and fled on a motorbike that followed the car," the recent Interior Ministry statement said. "The car exploded wounding six policemen."
The four-story headquarters of the National Security Agency and surrounding buildings were severely damaged, according to eyewitnesses and reporters.
Live feed from Shubra Al Kheima explosion site showing apparent damage to National Security building facade. #Egypt— Egyptocracy (@Egyptocracy) August 20, 2015
"The front glass window of my apartment broke and two doors fell down. It was like an earthquake," Hady Gad, a local resident of Shubra told AFP.
No deaths have been reported so far and nobody has claimed responsibility for the attack.
Location of blast in greater Cairo area. Shubra al-Kheima 11km/6 miles from Tahrir Square. pic.twitter.com/F79eiFUU8q— Erin Cunningham (@erinmcunningham) August 20, 2015
The Egyptian capital was recently hit by several explosions, including a car blast near the Italian consulate in July and a June bomb attack in Cairo’s Heliopolis region, which led to the death of Egyptian Prosecutor General Hisham Barakat.
Islamic State (ISIL) radicals claimed responsibility for the July explosion.