One Egyptian security officer was killed and between 3 or 4 more were wounded in a shooting incident near the St. Catherine monastery in the Sinai on Tuesday evening.
It is unclear if it was a friendly fire incident or a terror attack.
Some reports claim that an Egyptian soldier mistook an Egyptian unit waiting in ambush for terrorists and opened fire on them.
It was initially thought to be a terrorist attack with reports saying there was an explosion.
ISIS is claiming it was a terror attack, that they are responsible, and they shot at a police checkpoint from an overlooking hilltop.