有人能解释下面这个句子的含义并介绍一下这个事件的大概背景吗?
句子是 A spokesman for the Georgian Interior Ministry told the BBC that the authorities in Tbilisi were expecting the bombardment of government offices by Russian forces at any moment,though he couldn't back the claim with specific intelligence.
背景原文是：
Russia says its troops have been involved in fierce clashes with Georgian forces in the Georgian breakaway region of South Ossetia.Russia,which backs the separatists,says its troops have fired on Georgian positions in and around the capital Tskhinvali.Georgia said its military bases have been attacked by Russian aircraft,but the Georgian President Mikhail Saakashvili said its forces were in control of Tskhinvali.The separatists for their part say they control the town.Gabriel Gatehouse reports from the Georgian capital Tbilisi.A spokesman for the Georgian Interior Ministry told the BBC that the authorities in Tbilisi were expecting the bombardment of government offices by Russian forces at any moment,though he couldn't back the claim with specific intelligence.Shota Utyashvili said government staff had been evacuated from ministries and dispersed to secret locations.There have been separate reports of bombs falling on two other targets outside of the South Ossetia.The escalating crisis between Russia and Georgia has caused a flurry of diplomatic moves across the world· The United Nations Security Council is meeting again in an emergency session to discuss the crisis.
请问句子中的were expecting 能分析一下这个句子的成分吗，