U.S. embassy in Mexico "dismayed" over deadly attacks against journalists

• "We are dismayed by the situation that journalists are experiencing in Mexico," the embassy tweeted. "The murder of Heber López, founder of Noticias Web, is a detestable fact. A comprehensive investigation that finds those responsible is essential."

Why it matters: The slain local reporters are often investigating malfeasance, cartels or links between politicians and criminal organizations, Marina E. Franco notes.

• Last month, Monitor Michoacán journalist Roberto Toledo was shot by three armed men in the city of Zitácuaro. His murder came eight days after the murder of reporter Lourdes Maldonado triggered massive protests by journalists across Mexico and worldwide.

Go deeper: Mexican journalists unwavering after spate of killings