LASHKAR GAH (Reuters) - A suicide bomber killed 10 civilians on Sunday when he detonated his explosives near a crowd in southern Afghanistan, while a roadside bomb in the east killed two others, officials said. In the first incident, a suicide bomber driving a three-wheeled rickshaw detonated his explosives near a crowd who were holding a picnic for the Afghan New Year in Gereshk district of Helmand province, the provincial governors spokesman said. The target was an Afghan Army vehicle. The first reports are that 10 civilians have been killed and seven more wounded, said spokesman Daoud Ahmadi, adding the bomb missed its target. A witness at the scene told Reuters by telephone he had been no more than 50 metres away from the blast. The bomber was driving a rickshaw and was targeting an army vehicle. When the soldiers saw the rickshaw they sped up. The bomb exploded in a crowded area where many people were having picnics, said Khan Mohammad. Many people have been killed and wounded, he said. A spokesman for NATO-led forces in Kabul said none of its forces were killed or wounded in the attack, but that foreign troops were now in the area assessing the situation. Separately, in Khost province in the southeast of the country, a roadside bomb killed two Afghan civilians and wounded four, a senior police chief said. A civilian car hit a roadside bomb on the outskirts of Khost city. Two civilians were killed and four wounded, acting provincial police chief Mohammad Yaqoub Mandozai told Reuters.