Dozens of Ukrainians protested outside the interior ministry in Kiev on Wednesday after an anti-corruption campaigner was seriously injured in a shocking acid attack in the ex-Soviet country.

Activists demanded the ministry make public details of the growing number of attacks on civil rights activists and journalists.

Kateryna Gandzyuk, who works as adviser to the mayor of the southern city of Kherson, was leaving home on Tuesday morning when a young man poured around a litre of acid over her and ran away, Ukrainian media quoted police as saying.