ECONOMY

Four groups bid to build Thessaloniki metro extension

Four groups submitted financial and technical offers for a 518-million-euro project to extend a metro line in Thessaloniki, Greece?s second-largest city, Attiko Metro said on Monday.

A venture comprising AEGEK SA and Impregilo SpA, Seli SpA and Ansaldo STS SpA, and a group including TERNA SA, Alpine Bau GmbH and FCC Construccion SA submitted bids, the operator of the metro said in a statement on its website.

A third venture consisting of J