Texas has executed a Mexican for murder, despite objections from the United States and Mexican governments.
Mexico argued that the execution of Edgar Tamayo would violate international law, because he was not told of his right to seek legal assistance from the Mexican consulate.
The 46-year-old was found guilty of shooting a Houston police officer trying to arrest him for a robbery in 1994, the ABC reports.
US Secretary of State John Kerry made the rare move of asking Texas to delay the execution. But it went ahead, after a last-minute appeal to the Supreme Court failed.
Tamayo declined to make a final statement before he was injected with a lethal drug at Huntsville prison. He was pronounced dead 17 minutes later.
The execution was witnessed by the mother and four other relatives of his victim.