The cause of the blast was not immediately clear, but Rompetrol Rafinare’s general manager Felix Crudu Tesloveanu told media that early investigations suggest a cracked pipe may have caused the blast.
An Interior Ministry statement urged residents at the nearby town of Navodari and other areas in the vicinity to close their windows because of the billowing smoke.
Environment Minister Barna Tanczos wrote online that “The explosion can have extremely serious environmental consequences,” and that he has cancelled a working trip in order to assist authorities deal with the blast.
“The direction of the smoke is in the opposite direction to the beach and the city — which is why the citizens are safe,” the ministry statement said. “However, we ask the population to take protective measures by closing (their) windows.”
Octavian Berceanu, the head of Romania’s Environmental Guard, a government environmental protection agency, told The Associated Press that the environmental fallout from the incident is being monitored.
“We don’t have proper data right now,” Berceanu told the AP. “The smoke is going offshore, and some … is going to the beach but it’s not populated there.”
Romania’s environment ministry said Friday that “specialists from the Constanta Environmental Protection Agency have continuously monitored the volatile organic compounds on the site.”
The oil refinery is about 20 kilometers (12.5 miles) from Constanta.