Last week, the Taliban staged similar attacks, killing at least 20 police officiers in the provincial capital Farah City and in the Bala Balook district.
The Daesh terrorist group later claimed responsibility for the attack. Deputy provincial governor Younus Rasooli said the authorities had sent a fact-finding delegation to Bala Buluk to investigate the assault.
Also on Saturday, a suicide attacker detonated explosives at a checkpoint in Kabul on the edge of the Green Zone, a heavily guarded district of embassies, Afghan government offices and the presidential palace.
"At around 8:30 am, a suicide bomber on foot, well-dressed with a necktie on, was identified at a checkpoint".
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In a statement posted on its news agency Aamaq on Saturday IS said the attack was carried out by a bomber with an explosive vest and targeted the gate of the headquarters of the Afghan intelligence service in central Kabul.
The bombing took place in an area near an Afghan spy agency facility as well as the U.S. Embassy and other Afghan and global institutions.
"We expect the enemy to continue with these horrendous attacks", Nicholson said, but added there had been a "lowering of ambition" by the Taliban which he said had given up trying to seize cities or whole provinces in favour of soft civilian targets.
A blast erupted Saturday in the Afghan capital of Kabul, local media reported citing the Interior Ministry.
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Soldiers shot down one of the Helmand suicide bombers, but the explosive in his auto detonated at the entrance of the Nad Aali district Army base before they could diffuse it, provincial governor's spokesperson Omar Zwak said.
He said during the clash 12 Taliban insurgents were also killed.
A second suicide vehicle bomber targeted an NDS compound near a police headquarters in Helmand's provincial capital Lashkar Gah.
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