GERB leader Boyko Borissov appeared for questioning before an investigator at the Sofia City Prosecutor's Office, BTA reported. Former Finance Minister Vladislav Goranov and PR Sevdelina Arnaudova have also been called to testify.

• Police hold GERB leader Boyko Borissov in custody for 24 hours (update)

Late at night on March 17, the three were detained and held in custody for 24 hours. They were released the following day without being charged, as the Prosecutor's Office deemed the Interior Ministry's actions in the investigation flawed. This made it necessary to re-interview all persons whose testimony could contribute to clarifying the circumstances of the case.

On leaving the prosecutor's office, Borissov accused the government of making new debts with 3 times higher interest rates in just 30 days and signing a memorandum with "obscure companies".