New Delhi, Feb. 4 -- Colombian and Ecuadorian truckers and merchants gathered at a border crossing Tuesday to protest an escalating trade war between both South American countries.

Protesters called for their governments to eliminate 30% tariffs on dozens of goods, warning the levies will hurt the economy of border provinces and affect energy companies on both sides of the border.

Tariffs "generate crises, they don't help the economy," said Carlos Bastidas, president of an Ecuadorian transportation workers association. "With this protest we are hoping that both presidents eliminate those measures" and establish mechanisms for dialogue, he added.

Ecuadorian President Daniel Noboa last month announced 30% tariffs on Colombian goods, citi...