KABUL, Aug. 27 (Xinhua) -- Four police were killed and three others sustained injuries as a roadside bomb struck their van in Khost province of east Afghanistan on Thursday, police said.

    "It was a remote-controlled bomb targeting a vehicle of border police in Garboz district at 1 p.m. local time (0830GMT), leaving four dead on the spot and injuring three others," a senior police officer Shir Mohammad Kuchi told Xinhua.

    He put the attack on the enemies of peace, a term used against Taliban militants.

    Taliban militants have yet to make comment.

    Clash between police and insurgents in the neighboring Paktika province have left 12 Taliban fighters dead.

    Taliban militants have intensified their activities against government interests particularly security forces to destabilize peace in the country.