Two Texas men were indicted Wednesday in connection with the heat-related deaths of 53 migrants who were found inside a tractor-trailer in San Antonio last month, prosecutors announced.

The big picture: A federal grand jury in San Antonio indicted Homero Zamorano, 46, of Pasadena, and Christian Martinez, 28, of Palestine, on charges that include conspiracy to transport and the transportation of illegal migrants resulting in death, per a Justice Department statement.

Details: Authorities found dozens of migrants inside the 18-wheeler trailer in the searing heat on June 27.

Go deeper: Humanizing the thousands who died at the border

Editor's note: This article has been updated with new details throughout.