A NATO soldier was killed and four were wounded in an explosion in eastern Afghanistan, while at least seven Afghans were wounded in two separate suicide attacks elsewhere in the country, officials said Wednesday, according to dpa. The soldier, who was serving under the NATO-led International Security Assistance Force (ISAF) banner, died of wounds on Wednesday and four others were wounded in a roadside bomb attack in the eastern region, the ISAF said in a statement. A secondary roadside bomb was found in the vicinity of the explosion along with a truck containing various explosives, the statement said. The statement did not disclose the nationalities of the dead and wounded soldiers. Most of the ISAF troops in eastern Afghanistan are from the US. Meanwhile, police fired on a suicide bomber who was driving a vehicle filled with explosives toward a military base with US and Afghan troops in the Gurbaz district of south-eastern Khost province, said Mohammad Ayoub, provincial police chief. He said three Afghan civilians were injured in the explosion Wednesday morning. In another attack, a man riding a motorbike packed with explosives detonated himself near a police vehicle in Lashkargah city in southern Helmand province, provincial police chief Mohammad Hussain Andewal said. The blast killed the bomber and wounded two policemen and two civilians, he said. No group claimed responsibility for the Wednesday's bombings. Taliban militants, whose regime was toppled in a US military invasion in late 2001, rely heavily on the use of suicide attacks.