Six toy vendors were killed in an apparent robbery in a suburb of the Mexican capital, police said Thursday.

The four men and two women were slain in the wee hours of Thursday as they were returning to their home in Ecatepec, located in Mexico state, after selling toys at a nearby fair.

The assailants, who were armed with rifles, took a pickup truck belonging to the victims, unidentified police sources told media outlets.

The attackers apparently killed the vendors after they refused to hand over their merchandise and vehicles, the sources said.

Spokespeople with the Mexico state Attorney General’s Office said they had no information about the multiple murders in Ecatepec.