Bombs exploded in a discotheque and three booby-trapped cars on Sunday, killing six people and injuring 71 others just weeks before the first parliamentary elections in Algeria in five years.
There was no immediate claim of responsibility for the blasts. Islamic militants were blamed for a series of recent bombings - during the holy month of Ramadan - that bloodied the streets of the capital.
The fresh violence came less than a month before elections to choose a new parliament. Islamic militants, who were on the verge of victory in the last parliamentary vote, are barred from taking part his time around and thus oppose the ballot.
In the last of the series of explosions Sunday, a booby-trapped car blew up at Bordj el Kiffan, on the eastern outskirts of the capital, killing five people and injuring 30, officials said.
Hours earlier, a bomb exploded in a discotheque inside the zoological park in the hills above this port city, injuring 20 people.
Nine others were wounded when a car bomb went off near a women’s university dormitory.
Another booby-trapped car exploded near the Justice Ministry, not far from the other two blasts, killing one person and injuring 12.
Security forces sealed off areas surrounding the sites of the bombings.