Saudi Arabia has received technical and financial bids to build four stations along a 450km rail line.
The Haramain High-Speed Rail project will connect Mecca and Medina to the Red Sea coastal city of Jeddah.
The project will facilitate the transportation of millions of pilgrims to holy cities, according to uk.reuters.com.
Six consortiums, including Germany's Deutsche Bahn, Italy's Astaldi and British firm WS Atkins, have submitted bids for the construction of the stations.
France's Alstom, Austria's Strabag and Singapore-based ST Engineering are also expected to bid for the project.