The lawyer representing seven Ukrainians detained in Hungary following a police raid on a cash convoy this spring has told Euronews that former Prime Minister Viktor Orbán should be investigated for his possible part in the raid – and that he should have been detained.

In early March, two vans carrying a large quantity of cash and gold bound for Oschadbank's headquarters in Kyiv left Vienna, only to be stopped near the Hungarian capital shortly afterwards. The crew were detained, interrogated and expelled from Hungary, and the valuables were confiscated.

On Tuesday, Hungarian prosecutors questioned János Hajdu, the former director of Hungary's anti-terrorism unit TEK, who is suspected of giving orders that led to the allegedly unlawful detention of the Ukrainians. Hajdu remained free after his interrogation.

Lawyer Lóránt Horváth, who represents Oschadbank and the seven detained Ukrainians, told Euronews that those involved in the operation should have been detained for their actions.

Last week, a leaked document from the prosecutor's office, published by news site 444.hu, named four officials involved in the decision-making behind the police raid: Orbán, former secretary of state Örs Farkas, Tamás Demeter, the former vice-president of Hungary's tax office NAV, and former TEK chief János Hajdu.