A targeted explosion wounded six soldiers in the North Sinai border city of Rafah, the state-owned Middle East News Agency (MENA) reported on Thursday.
Unknown assailants planted the explosive device close to the Arish-Rafah road in the Sadat area. When the bus transporting the soldiers passed by, the bomb detonated.
Officials said the injuries were minor, and the men were quickly treated on site.
Security forces are currently sweeping the area for other bombs.
The authorities have not yet identified any suspects in the incident, and no one has claimed responsibility for the attack.
The Sinai-based militant group Ansar Beit al-Maqdes has claimed responsibility for a number of bombings over the past year. The group is accused of several deadly attacks on police and military forces both in and outside of Sinai.
Ansar Beit al-Maqdes uploaded a video on Monday night with footage of four soldiers killed at a checkpoint, as well as the bombing of the military checkpoint in Farafra in the Western Desert.
In the nine-and-a-half minute video, titled, “Oh, Soldier,” the voice of Sheikh Ibrahim al-Rabish warned the Armed Forces that more attacks were coming.
The video was uploaded onto Abu Qattada al-Ansary’s YouTube channel, and bore the logo of the Rassd network, which is known for its Islamist affiliation. Rabish’s name has been often associated with video releases by Ansar Beit al-Maqdes.
The video opens with a four-minute scene of civilians being beaten, arrested and tortured by police and military forces, as well as a woman testifying that female inmates were being raped by police.