European Union governments agreed to use 1.4 billion euros  ($1.50 billion) in profits from Russian frozen assets for arms and other aid to Ukraine, prompting Hungary to accuse fellow EU members of a "shameless" rule breach to bypass its objections.

"This is a clear red line, there was no example of such a shameless breach of common European rules before," Hungarian Foreign Minister Peter Szijjarto said.

A Hungarian legal team in Brussels is looking for ways of challenging an EU decision to use proceeds from frozen Russian assets by circumventing Budapest's opposition, Szijjarto said on his Facebook page.

Earlier, the European Union's foreign policy chief, Josep Borrell, said the EU had found a way to use the proceeds from frozen Russian assets to buy arms for Ukraine despite hold-ups from Hungary.

Borrell said the first tranche of the profits is expected to be available next week.

(With input from Reuters)