Mexican President Andres Manuel Lopez Obrador has issued a formal apology for the 1911 massacre of 303 Chinese people in the northern city of Torreon.
"The Mexican state will not allow ever again racism, discrimination and xenophobia," the president said during the ceremony in Torreon.
The massacre, from May 13 to 15, 1911, occurred in the midst of the Mexican Revolution, as rebels fighting under Francisco I Madero seized control of the city of Torreon.
During the massacre, more than 300 Chinese people were killed and their homes and businesses were burned.
Monday's event was attended by Chinese Ambassador to Mexico Zhu Qingqiao as well as high-level Mexican officials including the heads of the army and navy and the foreign and interior ministers.