The Daesh terrorist group claimed responsibility for the Tuesday attack on the security checkpoint, which is situated some 800 meters from the monastery.
St. Catherine is one of the world’s most important Christian sites and was built in the late 6th century and is registered as a UNESCO world heritage site.
The incident comes just over one week after the Takfiri terrorist group claimed responsibility for two deadly bombings on Christian churches in the country.
On April 9, at least 17 people were killed and more than 40 injured after a bomb targeted a church in Alexandria. The attack took place just hours after a church in the city of Tanta near Cairo was targeted with a remote-controlled bomb, killing at least 27 people and wounding around 80 others.