Budapest, Aug 12 (DPA) Hungarian President Laszlo Solyom expressed outrage Tuesday over plans by neo-Nazi groups to hold a commemoration marking the death anniversary of Adolf Hitler's former deputy, Rudolf Hess.

Solyom 'learnt with indignation' of plans by foreign and Hungarian far-right and skinhead groups to convene in Budapest Saturday to mark the anniversary of the death of a 'Nazi leader who was sentenced for war crimes', he said in a statement to state news agency MTI.

The governing Hungarian Socialist Party has asked police to ban the event, something that is difficult to do under the country's liberal constitution, which guarantees freedom of speech and assembly.