Four people have died in separate incidents of violence in Afghanistan, officials says.
A local aid worker in Faryab, a senior police officer in Nimruz, and an intelligence officer in Kunar province are among the four.
Local officials have blamed the Taleban for the killings. A Taleban spokesman has claimed responsibility for the attack in Nimruz province.
Insurgency related violence has left more than 1,200 dead this year.
Gunman
The aid worker was an employee of the Coordination of Humanitarian Assistance (CHA).
He was killed in an ambush in the north-western province of Faryab on Thursday, said Khan Mohammad Sameem, head of CHA in the province.
|
QUICK GUIDE

|
Three of his colleagues were wounded in the ambush, Farid Waqfi, head of CHA in Kabul, told the BBC.
He said they were on their way from Shirin Taqab to Meymanah when their car was ambushed at 13:30 local time (09:00 GMT) by an unidentified gunman.
The provincial governor, Mohammad Aamir Latif, blamed Taleban militants for the attack.
Remote device
In another incident, a car bomb near a mosque killed the provincial deputy police chief, Nafas Khan, and one of his bodyguards in Zaranj, the capital of the southern Nimroz province.
A second bodyguard was wounded as Mr Khan was parking his car next to a mosque, Ghulam Dastaqir, the province's governor, told Associated Press news agency.
The bomb was triggered by a remote control device, a senior provincial official said.
Taleban spokesman Mohammad Yousuf said his militants were behind the car blast.
An intelligence officer was killed in a roadside bomb in the eastern province of Kunar, officials said.
He was riding his bicycle home when the bomb went off, said provincial governor Assadullah Wafa.