By Scott Stewart On the morning of Jan. 28, two gunmen on a motorcycle assassinated Gen. Mohammed Said, an aide to the Egyptian interior minister, during his commute to work. The assassination came four days after the Cairo Security Directorate was attacked with a large vehicle bomb . Both events were claimed by a group called Ansar Beit al-Maqdis, which has declared war on the Egyptian security establishment. Ansar Beit al-Maqdis, which translates to "Supporters of Jerusalem," also tried to assassinate Egyptian Interior Minister Mohammed Ibrahim in September 2013 and did assassinate Lt. Col. Mohamed Mabrouk, a senior counterterrorism official, on Nov. 17, 2013, in Cairo. Most likely, the group is also responsible for bombing a natural gas pipeline south of El Arish on Jan. 28. Ansar Beit al-Maqdis seems confident and proficient in terrorism tradecraft.