Twelve security personnel were killed on Friday in an attack by suspected militants on a checkpoint in Egypt's volatile Sinai Peninsula, according to a military spokesman.
Six soldiers were injured in the attack that occurred west of al-Arish, the capital city of North Sinai, the spokesman said in a statement on his official Facebook page.
Security forces killed 15 militants and injured an unidentified number, the statement added, and they were combing the area for others linked to the attack.
Earlier, a security source said that nine security personnel were killed and eight were injured.
No one claimed responsibility for the shooting.
Security forces in the largely desert Sinai have come under repeated attacks from hardline jihadists since the 2011 uprising that toppled long-time dictator Hosny Mubarak.
The extremists stepped up their assaults after the army deposed Islamist president Mohammed Morsi in 2013, killing scores of security personnel.
A group loyal to the Islamic State radical militia has claimed responsibility for several of these attacks.