Athens - Police sirens and the smell of tear gas filled the streets around Greece's parliament building on Wednesday after protests against government spending cuts turned violent, then deadly. Three people died and at least four others were missing after a fire bomb hit a bank in central Athens, the Greek fire brigade told CNN. The victims, two women and a man, were bank employees, they said. Another 20 people were trapped on the floor above the MARFIN bank and were being rescued by firefighters, the fire brigade said. The three dead were removed from the premises along with five survivors, the fire brigade said. They would not say whether the five survivors included any of those missing inside the bank. Protesters were throwing bottles at police guarding the burned-out bank, shouting "torturers" and "liars" because they don't believe people were killed inside. Riot police were moving in to push the crowd away, CNN's Diana Magnay reported from the scene. Bins and cars were set on fire around the city. Two public buildings were on fire and a fire truck was ablaze near the Temple of Zeus, the fire brigade said. Riot police in helmets and shields ket back protesters who threw bottles, sticks, and rocks. Booms pierced the air every time the police fired canisters of tear gas at the crowds. A mass of protesters made it onto the steps in front of the Greek parliament building early in the afternoon before riot police pushed them back. Members of the parliamentary economic committee are inside the building reviewing a package of austerity measures to contain Greece's spiraling debt. The measures are highly unpopular in Greece and the protesters on the steps demanded that the lawmakers come outside and face them.