Another journalist has been killed in Mexico, marking the sixth such murder so far this year. Now, the United States is calling for greater protections for journalists in Mexico.

The body of Michelle Perez Tadeo, a 29-year-old television sports host from the Mexican state of Veracruz, was found near Mexico City this week. It’s still unclear whether her murder — which has been called a femicide — was related to her work.

Still, her murder is the latest in a string of killings of journalists in Mexico so far this year

In response to the violence, U.S. Secretary of State Antony Blinken took to Twitter on Tuesday to cite concerns over the dangers journalists face in Mexico.

White House Press Secretary Jen Psaki reiterated those concerns Wednesday after Mexico’s president claimed Blinken was misinformed and that there would be no impunity for those responsible for violence against reporters.

"We’ve seen factually the threats that have been posed to journalists in Mexico," Psaki said during a press conference. "That is a concern that I think the Secretary of State was expressing on behalf of the United States about those abuses. So I think he was speaking to facts we’ve seen on the ground.”

But Mexican leaders continue to push back. Foreign Minister Marcelo Ebrard sent a letter to Blinken on Wednesday highlighting Mexico’s investigations into recent killings, and suggesting that guns trafficked from the U.S. could have been used to murder journalists.

“I am sharing with you information that perhaps you didn’t know, and I reiterate our willingness to work with your government, with respect for the sovereignty of both countries, to advance the security of our peoples," Ebrard wrote.