Roadside bombs and a suicide bomber killed 20 people in a spate of attacks across Afghanistan on Thursday, officials said. In one of the attacks, 10 civilians, including a child and four men, died as their vehicle struck a land mine in southern Helmand province. Seven other people in the group which was heading to a wedding were wounded in the blast, said Ismail Khan Hotak of the provincial security coordination centre. A suicide bomber on a motorcycle blew himself up amid a police patrol in the southern city of Kandahar, killing the three policemen and wounding two, said Ahmad Jawed Faisal, a provincial governor spokesman. And five troops died when their convoy hit a land mine in eastern Laghman province, according to Sarhadi Zewak, also a governor spokesman. . .