President Donald Trump said the U.S. will impose an additional 10% tariff on any countries aligning themselves with the “Anti-American policies” of the BRICS group of developing nations, whose leaders kicked off a summit in Brazil on Sunday.

Brazil plays host to a summit of the BRICS bloc of developing economies Sunday and Monday during which pressing topics like Israel’s attack on Iran, the humanitarian crisis in Gaza and trade tariffs imposed by U.

The BRICS bloc of developing nations on Sunday condemned the increase of tariffs and attacks on Iran, but refrained from naming U.S. President Donald Trump. The group’s declaration, which also took aim at Israel’s military actions in the Middle East,