The Sunday attack was carried out in northern Sinai, where Egyptian government forces are battling militancy in connection with the presence of the Daesh Takfiri terrorists.
Sources provided neither the exact location of the explosion nor further details.
Last week, militants in Sinai opened fire on members of Tarabeen tribe and killed a dozen of them. The tribe members have been armed by the Egyptian military to counter the militants operating across the region.
The militants have also extended their campaign to other parts of Egypt, most recently attacking churches in the capital Cairo and other cities.
In early May, gunmen attacked an Egyptian police convoy in Cairo, killing three officers and wounding five others.
Hundreds of Egyptian security forces have been killed in violent clashes with militants across the troubled region over the past months.
Since July 2015, Egypt’s military has been engaged in a high-scale security operation against militants in Sinai following coordinated terrorist attacks on several army checkpoints that claimed the lives of 21 soldiers earlier that year.