(ANSA) - BELGRADE, JUL 6 - The regulated prices of petroleum products on Slovenia's national road network will increase at midnight, with a litre of regular petrol priced at EUR 1.561, up 2.4 cents, and diesel priced at EUR 1.64, up 3.5 cents, according to Slovenian news agency STA. The new prices, which only apply to service stations outside of motorways and motorway networks, will be in effect until July 13, according to Slovenia's Infrastructure and Energy Ministry. (ANSA).