A local aid worker and two senior provincial officials were among four people killed in Afghanistan, officials said on Friday, in attacks blamed on Taliban militants, Reuters reported. The employee of the Western-funded Coordination of Humanitarian Assistance (CHA) relief agency was killed in an ambush in the northwestern province of Faryab on Thursday in which his three colleagues were wounded, provincial CHA head Khan Mohammad Sameem said. Faryab's governor, Mohammad Aamir Latif, blamed Taliban guerrillas for the attack. The ambush followed one a week ago in which five local aid workers were killed in the southern province of Kandahar. In another attack, also on Thursday, Taliban guerrillas blew up a car, killing Nafas Khan, police chief for Zaranj, the provincial capital of Nimroz in the south. A colleague of Khan was also killed in the blast triggered by a remote device, a senior provincial official said, and accused the Taliban for it. An intelligence official was killed in a roadside bomb in the eastern province of Kunar, officials said.