Two hijackers holding a Greek bus with about two dozen passengers aboard have released five hostages. The two men and three women were released today several hours after the bus was hijacked in the outskirts of Athens by two armed men. The gunmen entered the bus and fired shots into the roof of the vehicle. The released hostages were taken to a police command center near the bus, which police said had 26 passengers aboard when it was hijacked. The bus was surrounded by police and ambulances. Authorities were negotiating with the hijackers who demanded to be taken to the airport and flown out of the country.