CAIRO (AP) — Militants in Egypt’s northern Sinai shot and killed four conscripts returning from holidays to their duty station Saturday, hours after two homemade bombs killed a teenager and her mother in a construction site near Cairo, security officials said.

The officials said the militants intercepted a small passenger bus near the northern Sinai town of Rafah, asked its passengers to get out before identifying the four conscripts and shooting them. The conscripts were dressed in civilian clothes, the officials said on condition of anonymity because they were not authorized to brief reporters as the investigation continued. The militants fled the scene.