Metropoliten, the company operating the subway system of Bulgarian capital Sofia, said on Wednesday that it has launched a tender for a 530 million levs ($330 million/271 million euro) expansion of Line 3 with six new stations.

The tender is divided into five lots, three of which envisage the construction of two subway stations each, one for the tunnel drilling and one for the supply and installation of control systems and platform screen doors, Metropoliten said in a tender notice.

The 5.67-km new section will link the Tsarigradsko Shose boulevard to the Slatina district, in the eastern part of Sofia.

Metropoliten intends to finance the project through the EU's Recovery and Resilience Facility.

The deadline for submitting offers is April 14.

The Sofia subway system currently comprises three lines with 40 km of tracks and 35 stations.

(1 euro = 1.95583 levs)