In the latest of a series of terror bombings, twin blasts on Wednesday claimed at least 11 lives in the city of Bouira, the Algerian Interior Ministry and local authorities reported.
In one attack, a suicide bomber drove his car into a military administration office in Bouira, 120 kilometres east of Algiers, dpa reported.
In the second bombing, a suicide attacker drove his car towards a hotel, but at the last moment diverted it to smash into a bus before exploding.
Combined, the two attacks killed 11 and wounded at least 31 persons, among them 27 civilians and four military personnel.
The attack comes a day after 43 people were killed and 45 wounded in a suicide car bombing in Issers, 60 kilometres east of Algiers.
The attacker drove a bomb-laden car into the main entrance of the school where police academy candidates were gathered.
The latest series of terror bombings began on Sunday when 12 people, including 11 soldiers and one civilian - were killed when suspected Islamist terrorists attacked a military convoy near the coastal town of Skikda, 350 kilometres east of Algiers.