A bomb blew up a construction company vehicle in a remote eastern Afghanistan area on the border with Pakistan early Sunday, killing seven Afghan workers, police said. The blast struck the vehicle in the eastern province of Nangarhar, near the mountainous border with Pakistan, provincial police spokesman Abdul Ghafoor said. "Early in the morning a roadside bomb struck a private construction company vehicle in Haska Mina district, killing seven construction workers and wounding one," he said. "They were Afghan civilians working as roadworkers, engineers and supervisors for a company doing various construction work in the district." The district is about 50 kilometres (30 miles) southeast of the provincial capital, Jalalabad, in an area under the influence of insurgents, either Taliban or a radical faction headed by ex-prime minister Gulbuddin Hekmatyar. There was no immediate claim of responsibility for the blast. Civilians are the main victims of Afghanistan's insurgency with nearly 2,200 killed last year in attacks linked to the conflict between the militants and pro-government forces, according to the United Nations.