Bulgaria has invested a combined 17 million levs ($11.5 million/8.7 million euro) in the expansion of the capital Sofia's subway depot and in the factory for repair of underground trains, the transport ministry said.
The financing was provided under the EU-funded operational program Transport, the ministry said in a statement.
The investments are part of phase two of the project for the expansion of the Sofia subway network, under which the municipality built 7 kilometres of tracks and bought 18 trains.
The capital's underground railway network is 31 km long and has 27 stations. Once completed, the underground will connect the northwestern part of the city with the Business Park in its southeastern outskirts.