June 19 (Reuters) - French train maker Alstom has signed a 323 million euro ($347.1 million) contract to supply Italy's Mercitalia Rail with 70 locomotives with 12 years of maintenance services.

The contract for Traxx Universal locomotives has an option to supply an additional 30 locomotives, Alstom's statement said.

Mercitalia is owned by Polo Logistica FS. ($1 = 0.9305 euros) (Reporting by Olivier Cherfan Writing by Olivier Sorgho Editing by David Goodman )