The Shubra El-Kheima bombing that was heard everywhere !! "Updated"

From half an hour ago, people in different areas in Cairo and Giza heard huge and loud explosion sound.
From half an hour, people were speculating the source of the sound and whether it was a bomb like the Italian Consulate or just another F16 breaking the sound barrier for no reason at 2 AM.
Unfortunately, I did not hear anything because I was watching Mortada Mansour slammed by Capitan Zizo with headphones on “Football fans will relate”
Now the Egyptian State TV is saying the source of that big explosion sound is an explosion at the State security “National security” building in Shubra El-Khaimah.
Yes, the State security building in Shubra El-Khaimah was bombed tonight. Now more websites are reported that three bombs detonated at the building parameter. The ambulance authority is reporting that at least 6 people were injured.
@3:42 AM: at least 20 were injured and transferred to a hospital, no fatalities have been reported so far. 
The bombing was too strong that parts of the building were destroyed according to the photos taken by Al Masry Al Youm journalist Omar Al-Hady.

The building after explosion by Omar Al-Hady

The building after the explosion by Omar Al-Hady 

Already windows and buildings beside the building were badly shaken, not to mention the explosion was heard in Giza and Cairo

A school beside the building damaged by the explosion
"Omar Al-Hady" 

A car and a building affected by the explosion
"Omar Al-Hady" 

Here is a short video showing the people and the explosives squad at the location of the bombing.

#Egypt | 6 wounded in a blast that rocked state security building in Shoubra al-Kheimah north #Cairo pic.twitter.com/FYW55UBgeZ

— Zaid Benjamin (@zaidbenjamin) August 20, 2015

Ironically no official was awake when it happened to tell the people what happened and there was confusion in the media to locate the explosion in the first place.
The ministry of interior issued its statement, the official version of what happened.

صرح مسئول مركز الإعلام الأمنى بوزارة الداخلية بوقوع إنفجار بمحيط مبنى الأمن الوطنى بدائرة قسم أول شبرا الخيمة فى الساعات...
Posted by ‎الصفحة الرسمية لوزارة الداخلية‎ on Wednesday, August 19, 2015

 According to the statement, the bombed car suddenly stopped out the state security building and its driver left it and took a motorcycle fleeing the scene. The motorcycle and its biker were moving behind the car.
What kind of explosion used in those three bombs that could be heard in three governorates like that in a summer night !? Also how were those bombs planted in the parameter of the STATE SECUTIRY APPARATUS ??
By the way, this bombing will be the first test for the New Anti-terrorism law especially when it comes to the media and social media.
Now I wonder who stands behind this bombing: IS-affiliated Ansar Beit Al-Maqdis "ABM" or Al-Qaeda-affiliated Al-Morabtoon or some other new player !? This is not your Improvised explosive device targeting a traffic checkpoint after all.
ABM claimed the responsibility of bombing the security directorate in Mansoura and Cairo in the past if you remember.
Latest updates at 01:25
A group affiliated with the Islamic State in Egypt "Not Sinai Province" but rather "Egypt Province".
In a statement released on affiliated-IS social media, the group claimed its responsibility for the attack targetting the State security building which is believed to be an old abandoned one already.
The group claiming that it bombed the building to avenge for their brothers in "Arab Sharkas" cell.
The Arab Sharkas cell was located in Qalubiya governorate as well.

This is the second time the group claims responsibility for an operation in Great Cairo in nearly a  month.
If you remember they claimed responsibility for the bombing of the Italian consulate.