MILAN, Italy, March 16 (UPI) -- Italian police have arrested four people, including former public works ministry manager Ercole Incalza, in connection to suspicious public project contracts worth about $26 million.
About 51 people are under suspicion in the investigation, including former politicians. Police arrested the suspects in Rome and Milan and raided homes and offices throughout Italy.
It has not been determined how much Incalza gained from the alleged bribery scheme with businessman Stephen Perotti, who was also arrested.
Investigators suspect contracts were given after officials were influenced with bribes. Contracts include the Italian Pavilion built for the Expo 2015 World Fair in Milan, a high-speed railway in Milan and a project to build a thousand-mile long highway starting from Tunisia, through Libya and ending in Egypt.
Italian national anti-corruption chief Raffaele Cantone recently said that the expo would open with a "few problems," but denied corruption claims. Milan's Expo 2015 fair is scheduled to begin May 1.