A massive explosion awoke Cairo residents on Thursday at 1:50 am. The explosion was heard across different areas in Cairo, from Nasr City to Haram, Zamalek, Mohandiseen, Tagamoa3 and Maadi, causing windows to shake, according to Twitter users. Ambulance sirens were heard in Dokki and Shubra. Initial reports indicated the explosion struck the National Security building in Shubra Al Kheima. More updates to follow.

Just heard and felt a massive explosion in Mohandeseen! Literally thought it was something right outside my window. #Egypt #Explosion #Cairo — Omar Harbi (@Harbi10) August 20, 2015





Okay several reports in websites and tweeps say that that the State security building in Shubra El-Kheima , Qalubiya governorate was bombed — Zeinobia (@Zeinobia) August 20, 2015





Almost 15min now and no official statement about source of loud explosion-like sound in #Cairo. #Egypt — Egyptocracy (@Egyptocracy) August 20, 2015





@tekaldas I'm in Maadi. Building didn't shake, but deep rumble woke me up. Like consulate. — Dudes on Scooters (@DudesOnScooters) August 20, 2015





Only three fact can be confirmed thus far 1 there has been a large explosion in Cairo 2helicopters and ambulances can be heard 3Many rumors — Amr No 2 CC (@Cairo67Unedited) August 20, 2015 Apparently, state tv in #Egypt has just confirmed that the explosion was in front of the state security building in Shobra El Kheima. — Omar Kamel (@OmarKamel) August 20, 2015



