Bulgaria introduced a temporary ban on Ukraine grains imports except for those in transit, Radio Bulgaria reported on its website on Wednesday quoting caretaker Prime Minister Galab Donev.

"Over the past year, a significant amount of food has remained in the country and disrupted food chains," the report quoted Donev as saying.

"We are forced to adopt this national measure because the European authorities are still considering an adequate measure."

(Reporting by Ivana Sekularac and Aleksandar Vasovic; Editing by Louise Heavens)