March 25 (UPI) -- Environmental organization Oceana has accused the Mexican government of maintaining an opaque response to an oil spill that has affected at least 390 miles of coastline in the Gulf of Mexico.

The oil has largely impacted the southern part of Veracruz state and the northern part of Tabasco state since early March, with dozens of contaminated sites still not receiving attention.

The spill has lasted nearly three weeks without an identified cause or confirmed responsible parties, affects the southwestern Gulf of Mexico reef corridor, a key ecological area that stretches along the coast between both states.

President Claudia Sheinbaum said the Office of the Attorney General is investigating, with support from environmental and energy agencies, while an interdisciplinary team analyzes the causel.

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