Moscow, Sep 14 (DPA) Russian President Dmitry Medvedev in a speech at a global security conference attended by European heads of government Monday again called for a modern international security pact.

'No one should hide problems behind an 'iron curtain',' Medvedev said at the opening of the first international Modern and Global Security Conference being held in Yaroslavl, some 300 km

north-east of Moscow.

The problems of one country today have the potential to lead to international conflict faster than before, he warned.

Medvedev said 'from Vancouver to Vladivostok,' a new security pact was needed to guard against problems such as the current financial crisis in future.

Medvedev also warned against national unilateralism in an 'increasingly complex world.' It was an 'illusion' to want to justify military adventures with bombastic excuses, he said.