The "window for diplomacy" over Iran's nuclear programme would "not remain open forever," British Foreign Secretary William Hague said Thursday, DPA reported.
"Some ministers made that clear (today)," said Hague, after hosting a two-day meeting of G8 foreign ministers in London.
The latest round of international talks over Iran's nuclear programme ended inconclusively on Saturday.
"Tehran's position falls short of what we need for a breakthrough," said Hague.