(Corrects to say rolling stock in second paragraph of story originally published May 15.)
May 15 (Bloomberg) -- Arriyadh Development Authority, the Saudi government body responsible for Riyadh, has invited groups to pre-qualify for building a metro train line in the Saudi capital.
The companies must be specialized in the production and supply of rolling stock and metro tunneling, the authority said today on its website. The bids must be submitted by June 20, it said.
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