“An obscure group calling itself the Popular Resistance Movement claimed responsibility. Six bombs exploded on main arteries of the Giza district in what appeared to have been a well-coordinated attack. The ability to carry out the attacks highlighted the growing threat posed by such previously unknown outfits cropping up in Cairo and around the Nile Valley.
The new groups have no apparent ties to Egypt’s main extremist organizations, based in the North Sinai. The main extremist group there has killed hundreds of soldiers and police officers in a campaign of assaults on security forces since the military’s ouster of President Mohamed Morsi of the Muslim Brotherhood in 2013, and the organization recently pledged allegiance to the Islamic State, also known as ISIS or ISIL.”
Source:Obscure Group Says It Set Off Blasts in Egypt, Raising Alarm – NYTimes.com