The Mexican newspaper where a reporter who investigated drug gangs worked until she was murdered has announced it is closing its print edition due to a lack of security.

The director of the Ciudad Juarez-based newspaper, Oscar Cantu, wrote Sunday in an article titled "Adios!" that Miroslava Breach's slaying last month led him to reflect on the dangers of practicing journalism in the region, where "high risk is the main ingredient."

Breach, 54, who wrote for the newspapers Norte and La Jornada, was found dead in her vehicle with multiple gunshot wounds to the head on March 23 in the city of Chihuahua, capital of the state of the same name.

Ciudad Juarez, located in Chihuahua state on the US border with Texas, was for years one of the bloodiest battlegrounds in Mexico as drug cartels fought over lucrative

smuggling routes into the United States.

Breach reported on organized crime, drug-trafficking and corruption during a 20-year career as a journalist in northern Mexico.

She had recently published a report about a conflict between

leaders of the La Linea group, part of the powerful Juarez cartel.

"Deadly attacks as well as impunity in crimes against journalists have become evident, preventing us to freely continue to do our job," Cantu wrote.