Both organizations warned global leaders that recovery is likely to be slow, so counter recessionary measures ought not be rolled back too early.

Germany's leaders warned Russian and Ukrainian leaders about their military plans.

United Nations officials have warned Bosnian leaders not to assume that the success of most Muslims in surviving last winter can be repeated.

Obama warns Middle East leaders 'chance may not come again soon'

Both liberal Democrats and conservative Republicans have been warning leaders of their parties not to sell out their principles to get a deal.

The state comptroller warned legislative leaders that paychecks for 10,300 state employees would be delayed if a budget was not approved by Thursday.

But he warned Western leaders not to underestimate the seriousness of Montenegro's crisis.

Beijing has warned national leaders of the price to be paid for supporting him.

He also warns political leaders that they have to govern well and learn to take advantage of international opportunities or their fragile economies are doomed.

"It is unpleasant that certain of you have started criticizing the constitution," he warned leaders of major blocs at a meeting in the Kremlin.