HERAT  – Suicide bombers killed at least nineteen people in attacks across Afghanistan on Tuesday, including 11 Afghan police, as insurgents ramped up violence ahead of the traditional summer fighting months.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, in volatile southern Helmand province, three suicide attackers targeted the district governor’s office in Musa Qala district, killing eight police. Two of the bombers were shot dead, but one managed to detonate explosives.“The first one opened fire on Afghan police. In response he was killed by our forces, while the second one detonated himself and police killed the third,” said Dawood Ahmadi, spokesman for the Helmand provincial governor.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.Herat, a business hub on the Iranian border, is normally relatively peaceful as most Taliban attacks are concentrated in their strongholds in the south of the country, including Helmand.But the start of the new “fighting season” this spring has also seen a major attack in the northern province of Faryab last week, in which three US soldiers and seven Afghans were killed. That attack was claimed by the Taliban. Also last week, a Taliban suicide bombing killed a local councillor and key ally of Karzai’s in the eastern province of Kunar.