A wave of car bombings and other attacks killed six people and injured 13 in Algeria on Tuesday, the official news agency reported.
There were at least seven bombings, the APS agency said. Two of the dead and 10 of the injured were police officers, the agency said.
One target, a police station in Boumerdes, was severely damaged by a car bomb before dawn, according to a resident reached by telephone in the town, which is 40 kilometers (25 miles) east of the capital, Algiers.
The government did not say who it believed was behind the attacks, nor were there any immediate claims of responsibility, the AP says.
However, an al-Qaida-aligned Islamic insurgent group, the Salafist Group of Call and Combat, is active in Algeria.
Although whittled down to a few hundred members, the group carries out regular bomb attacks in Algeria and raises funds in Europe for al-Qaida's operations in Iraq.
In December, the group staged a daring bomb attack on buses carrying foreign workers of an affiliate of U.S. energy services giant Halliburton, killing an Algerian bus driver and wounding nine others.
Representatives of the Israeli Defence Ministry responded to recent reports about the possible delivery of S-300 SAM systems from Russia to Syria. Israeli Defence Minister Avigdor Lieberman said that Israel would destroy those systems
Russia is to start supplying S-300 air defence systems to Syria in the near future. The shipments will be conducted free of charge