BAKU (Reuters) - Azerbaijan’s general prosecution office said on Sunday that five people from one family have been killed by the shelling from Armenia’s forces, the first civilian casualties from Baku in the latest flair up over a breakaway province. Clashes erupted between Armenia and Azerbaijan on Sunday over the volatile Nagorno-Karabakh region, reigniting concern about instability in the South Caucasus, a corridor for pipelines transporting oil and gas to world markets.