Hungary's prime minister says security measures will be tightened in light of the terror attacks in Paris and has declared Sunday as a national day of mourning.

Viktor Orbán also said Saturday that a special congress of his Fidesz party to have been held Sunday to elect new leadership has been postponed.

Though officials say they had no information about Hungary being a target of direct terror threats, controls will be reinforced at border checkpoints, while police and military police patrols will be increased, for example, at airports, millitary bases, central Budapest, other bigger cities and the country's nuclear power plant and officers and millitary police will be better armed than usual.