KABUL, March 4 (Xinhuanet) -- Four intelligence agents were killed Saturday in a bomb explosion in Afghan southern province of Helmand, a local official said.

    "This morning at about 11:00 a.m. (6:30 a.m. GMT) when the intelligence department director of Nawah district traveled in Nadali district with three of his colleagues, their car was blown up by a remote-controlled bomb. All the four persons were killed," Assadullah Shierzad, the provincial intelligence department chief told Xinhua.

    "So far no one has been arrested for the accident, and the investigation is still going on," he added.

    Helmand, together with Kandahar, Uruzgan and Zabul, the former stronghold of Taliban, has become the hotspot of the firefight since the beginning of this year.

    Eight Taliban militants were killed, 10 of them were arrested, and four Afghan police were injured in a firefight Friday in Helmand.

    After the loss, Taliban carried out several attacks to the official in one of which the district chief of Sangin in Helmand was killed by two militants Friday. Enditem