CIUDAD VICTORIA, Mexico — Mexican investigators on Tuesday pointed to organized crime in the killing of a top federal official in the northeastern state of Tamaulipas the previous day, saying it was likely retaliation for the authorities' recent seizures of stolen fuel there.

On Monday, gunmen killed Attorney General’s Office Tamaulipas state delegate Ernesto Vásquez Reyna in broad daylight, in the middle of the busiest avenue of the border city of Reynosa.

The Attorney General’s Office said in a statement that preliminary information suggested the killing was retaliation by a group it did not name.

Images from the scene of the assassination showed a smoldering black SUV and Vásquez Reyna’s body on the pavement. Authorities did not offer details on the attack other than to say that two

See Full Page