BEIRUT (AP) — A key Syrian opposition group says a major building belonging to the ruling Baath party in the capital Damascus has been by hit several rocket-propelled grenades. The Local Coordination Committees activist network reports several explosions heard in the district of Mazraa in the heart of the Syrian capital. It said in a statement Sunday that the bulding had been hit by several rocket propelled grenades and that two fire brigades headed toward the area amid heavy security presence. There was no immediate confirmation of the report, which would mark the first significant attack on a government building in relatively quiet central Damascus.