VIENNA - Explosives experts defused a World War Two bomb discovered at a construction site in Austria's second-largest city on Tuesday.

The 250-kilo US aerial bomb was found by workers at the site in Graz where the city's new train station is being built.

The discovery came a month after another WWII 250 kg aerial bomb was found by workers at the same construction site.

"The bomb is located beneath a building this time, which facilitates the procedure significantly," said bomb disposal officer Wolfgang Hubel.