An Egyptian jihadist group released video footage on Tuesday that it said showed the execution of two army informants in the insurgent flashpoint of the Sinai Peninsula.
Ansar Beit al-Maqdis, the country's deadliest militant group which has pledged allegiance to the Islamic State group that has seized large areas of Iraq and Syria, has previously released videos of beheadings.
The new video posted on YouTube shows the "confessions" of four men who admitted to being informants.
It then shows a militant shooting two handcuffed men, one of whom is also blindfolded, in the head. However, it is not clear if the two men killed were among those had confessed.
Jihadists are also shown manning checkpoints and searching for soldiers and policemen, and the footage features a militant vowing to launch more attacks on Egyptian security forces.
Ansar Beit al-Maqdis (Partisans of Jerusalem) says it has killed at least 12 people since August last year, often by beheading, for allegedly working for Israel's Mossad spy agency.