Mexico's interior secretary says federal authorities have arrested the suspected killer of internationally recognized journalist Javier Valdez.

Alfonso Navarrete Prida said via Twitter late Monday that federal agents in a joint operation had just arrested the suspect, but provided no additional details.

Valdez was gunned down in a street in Culiacan in the western state of Sinaloa on May 15, 2017.

He was known outside Mexico for his deeply nuanced books about the intersection of drug cartels, politicians and other segments of society. Inside Mexico, he was respected as a veteran journalist who generously shared his knowledge and kept readers informed with a regular column in Riodoce, a publication he helped found.

His killing led to a resounding outcry, but the killings of Mexican journalists have continued.