The Algerian state news agency says a woman was killed and two other people were wounded by a roadside bomb east of the capital.
The bomb is believed to have been planted by militants who frequent the district of Boumerdes, 35 miles (50 kilometers) east of Algiers.
It exploded as a car carrying a 40-year-old women, her husband and 7-year-old passed by on Monday.
The area is known as a stronghold of the North African branch of the al-Qaida movement.
A security official, meanwhile, said the army ambushed two militants late on Sunday in Tizi-Ouzou, 60 miles (100 kilometers) east of the capital, killing them.
The official spoke on condition of anonymity because he was not authorized to speak to the press.