Police in Ruen have detained a 28-year-old driver from the village of Razboyna for up to 24 hours after stopping him with 1.28 per mille of alcohol in his blood and a car with no number plates, Burgas regional police said.
Officers from the Ruen district police station checked the man, who was driving a Volkswagen Passat, at about 00:50 on Monday, 9 November.
A breath test on the spot was positive. The driver then refused to give blood for a lab test.
Police have opened fast-track proceedings.
Under the Criminal Code, driving with more than 1.2 per mille is a crime. His reading is above that limit.