BOGOTA (Reuters) - Colombian President-elect Gustavo Petro said on Tuesday he had had a "very friendly" telephone call with U.S. President Joe Biden.

       Petro, a former M-19 guerrilla who has been roundly critical of the U.S.-led war on drugs, was elected on Sunday on promises to tackle deep inequality and climate change and to seek peace with remaining leftist rebels.

       "On the road to a more intense and normal diplomatic relationship I have just held a very friendly conversation with U.S. President Biden," Petro said on Twitter. "In his words, a 'more equitable' relationship for the benefit of both peoples."

       (Reporting by Julia Symmes Cobb; editing by Jonathan Oatis)