At least 10 civilians were killed in separate bomb explosions in Afghanistan's Paktia province, officials said.Provincial governor's spokesman Naqib Ahmad Atal said at least five members of a single family were killed in the first explosion in Samkanai district on Friday, Khaama Press reported on Saturday.He said the incident took place after a vehicle carrying the civilians struck an improvised explosive device (IED).Atal added that five more people were killed in a separate explosion targeting a tractor vehicle in the same district.