Eleven people died and 28 were wounded when two suicide attackers rammed a car bomb into a government compound near the western city of Herat, the interior ministry said.
Provincial police chief Sayed Agha Saqeb told reporters that the bombers were being pursued by police when they detonated the vehicle at the entrance to the Guzara district compound along the road from the airport to the city.
"The car was under our surveillance. It was ordered twice to stop but they didn't stop," said the police chief.
"There were two individuals in the car, one was wearing a burqa. One of the bombers is totally shattered and the other person's body is still there with his (suicide) vest still unexploded."
The dead included three policemen and eight civilians, a provincial spokesman said.
Just hours later, four policemen died when three suicide bombers stormed their compound in the southern province of Helmand, a local government spokesman said.
Two of the bombers set off explosives strapped to their bodies and a third was shot dead by police guarding the Musa Qala police offices in the troubled province, Daud Ahmadi, the spokesman for the provincial administration, told AFP.
"Three suicide attackers entered the police compound in Musa Qala district of Helmand. Two of them detonated their explosives, one was killed by police," Ahmadi told AFP.
Police chief Abdul Wali and four others were wounded in the attack, he said.
In the Herat bombing, most of the victims were civilians visiting the local administration offices on business, an official said.
An AFP reporter, among the first to arrive at the scene, said he saw bodies strewn among rubble and pieces of metal from the bombers' car.
Another witness told AFP that women and children were present when the bombing happened.
"Shortly before it happened, I saw some women and children there. After the bombing I saw up to 10 people lying in blood," the witness told AFP.
There was no immediate claim of responsibility for either attack, but suicide bombings are a hallmark of Taliban insurgents fighting to topple the Western-backed government of President Hamid Karzai.
