A consortium that includes Spanish construction companies FCC and ACS has won a 35-year concession to build, operate and maintain the Lima Metro's Line 2 with a 3.9-billion-euro ($5.37-billion) bid, sources involved in the process told Efe Friday.

Peru's private investment promotion agency, ProInversion, declared the technical proposal submitted by Consorcio Nuevo Metro de Lima, the lone participant, to be a valid bid, the sources said.

Line 2 will link the Lima metropolitan area districts of Ate and El Callao, a 35-kilometer (21-mile) underground route that will include a branch to the Jorge Chavez International Airport.

The winning consortium also comprises Italian engineering companies Impregilo and AnsaldoBreda and Peruvian construction firm Cosapi.

Mexico's Ica and Brazil's Odebrecht, part of a consortium that was awarded a civil infrastructure and electromechanical works concession for Lima Metro's Line 1, were among the companies that initially showed interest in the Line 2 concession

During the bidding process, the Lima engineers association filed a complaint with the Transport and Communications Ministry, saying that some foreign engineers who signed the Line 2 project study plans were unqualified for that task.

Other business sectors have objected to the project's cost and the fact only one bid was submitted.

The concession includes the construction of 35 stations to serve 2.4 million users who live or work in the project's area of influence. EFE