TBILISI (Reuters) - A gunman has released unharmed all nine hostages he had taken at a microfinance organisation in the Georgian capital Tbilisi on Friday, police said. According to preliminary information, the gunman was not demanding a ransom but had some social demands, including lower prices for medicines. Last month, a masked gunman took 43 hostages during a bank robbery in the town of Zugdidi in western Georgia. He disappeared after receiving a ransom of $500,000 and releasing all hostages.