KYIV (Reuters) -The Ukrainian military said two soldiers were killed and four wounded in shelling by pro-Russian separatists in east Ukraine on Saturday, where a flare up of violence this week has sparked fears it could be the trigger for Russian military action. The Ukrainian military said on its Facebook page it had recorded 70 ceasefire violations by separatists since the start of the day compared with 66 cases over the previous 24 hours. Separatists opened fire on more than 30 settlements along the front line using heavy artillery, which has been prohibited by agreements aimed at cooling t…