A teenage suicide bomber killed seven people in central Afghanistan on Wednesday when he targeted local fighters who battle against Taliban insurgents, officials said.
The attacker detonated himself in a market place in Ghazni province, two days after another bomber struck outside government buildings in the north of Afghanistan killing 14 people including a provincial politician.
"At around 5:00 pm, a 18-year-old suicide attacker blew himself up in a market in the district of Muqur," Ghazni province deputy governor Mohammad Ali Ahmadi told AFP.
"As a result, four anti-Taliban fighters and three civilians were killed and 14 others injured."
Local army spokesman Nazifullah confirmed the incident and death toll to AFP.
There are many small bands of tribal militia across Afghanistan who fight against the Taliban insurgents who were toppled from power in 2001. The groups deny receiving weapons and support from the government.
The Taliban launched their annual "spring offensive" last month vowing to use suicide blasts to inflict maximum casualties and warning Afghans working for President Hamid Karzai's regime to distance themselves from the government.