At least four people have been killed and several others injured after a suicide attack in Kabul, Afghanistan.
A security official said a suicide bomber was riding a motorbike and targeted a vehicle carrying national security officials.
There was no immediate claim of responsibility for the attack.
An interior ministry official confirmed the attack but could not say how many people had been killed or injured.
"The suicide bomber was on a motorbike and detonated himself in the Pul Mahmood Khan area (in Kabul). The target is unclear but there were casualties," interior ministry spokesman Najib Danish said.
The Taliban has claimed responsibility for an explosion which killed at least four at the Nato air base at Bagram, north of Kabul in Afghanistan.
At least 14 others were injured in the blast which happened just after 5.30am, the Nato-led Resolute Support mission said.
There was no immediate word on the identity of the victims.
A Nato spokesperson said: "Response teams at Bagram continue to treat the wounded and investigate the incident."
The Taliban's spokesman, Zabihullah Mujahid, claimed responsibility for the attack on his Twitter account.
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An explosion has shaken the German consulate in Afghanistan, a NATO spokesman has said, with reports of a gun battle ensuing.
The blast happened in front of the building in the northern city of Mazari-i-Sharif - with the Taliban issuing a statement claiming they had sent suicide bombers to the consulate to carry out the attack.
Residents reported hearing a "huge explosion" which shattered windows in the surrounding buildings.
Walter Hassmann, the German ambassador to Afghanistan, said the "incident is ongoing" but would not confirm any further details.
There were no immediate reports of any casualties.
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A strike in Afghanistan carried out by the US killed one of the senior leaders of Al Qaeda, the Pentagon said on Friday.
Faruq al-Qatani served as the group's leader for northeastern Afghanistan, and had been assigned to re-establish safe havens in the country.
He was killed in a strike on October 23 in Kunar, Pentagon spokesman Peter Cook said in a statement.
He said the Pentagon was still assessing the outcome of another strike on the same day that targeted another leader in Afghanistan, Bilal al-Utabi.
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At least 14 people have been killed and another 26 injured after an attack at a Shia Muslim shrine in the west of Kabul on Tuesday night.
The Afghan Ministry of Interior spokesman Sediq Sediqqi confirmed that the attack was carried out by one person using an automatic rifle and grenade.
The Kart-e-Sakhi shrine is an important religious site for Shia Muslims. Many were praying when the attack occurred as Wednesday marks the holy day of Ashura.
Jamshed, a Kabul resident who witnessed the attack, said the assailant was wearing a police uniform.
He said: "I was selling bread at the gate of the shrine, and then someone came over and placed a package five meters away from me. He was wearing a police uniform, carrying an AK-47.
"He fired a few rounds first, but did not hit anyone. Then he shot a soldier. The soldier fell to the ground dead. He then fired at me, I just dropped my things and fled."
Thirteen civilians and one police officer have been confirmed dead.
Military police arrived at the scene quickly and shot dead the attacker.
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