At least four Egyptian security personnel were injured today in an attack outside a military intelligence building in Anshas in the Sharkiya governorate. In a statement released to Facebook, Egypt’s army spokesman said the attack destroyed part of the building’s back wall.

While not definitive, multiple reports indicate that the explosion was likely the result of a car bomb. “The blast is believed to have been caused by a car laden with explosives detonating near the intelligence building,” Al Ahram reported. In a separate report, based on comments from a security official, Al Ahram stated that the “blast resulted from a remotely-detonated explosive device planted inside a privately-owned Hyundai Verna car.” Security sources told the Associated Press that the remains of a vehicle were found near the building.

Hours after the attack, state-run MENA reported that authorities had managed to arrest “a person suspected of involvement.”