Video appears to shows more than a dozen men lined up outside funeral service and executed by cartel gunmen in Mexico

Mexicans were left wondering what happened to more than a dozen men who were seen lined up against a wall by drug cartel gunmen toting assault rifles. In a video apparently shot by a resident of the town San Jose de Gracia in the western state of Michoacan and posted on social media, bursts of gunfire broke out and smoke covered the scene.

The camera cuts away, but some assumed all the men — perhaps as many as 17 — died.

But prosecutors said Monday that they cannot say how many died, because the attackers cleaned up the scene, washed the sidewalk and carted away any bodies. Investigators found only a bag full of brains and shell casings at the scene.