Unknown gunmen kidnapped three civilians on Saturday in Rafah, North Sinai.
Two of the three who were kidnapped were working at the Rafah border crossing.
In a separate incident, a 37-lady was shot dead by unknown assailants in Sheikh Zuweid city. It is currently unknown why she was shot.
The restive Sinai Peninsula has witnessed the increasing presence of extremist groups which have carried out fatal attacks against police and army forces since the ouster of Mohamed Morsi in 2013.
Security forces have been leading ongoing campaigns against suspected extremist havens in the region.
Military sources said the army managed to kill 17 members of the Sinai Province, a group loyal to the Islamic State, in land and air raids in North Sinai on Saturday.
Edited translation from Al-Masry Al-Youm