Authorities in Mexico say a journalist has been murdered in Tijuana, the second killing of a media worker in the border city in less than a week and the latest in a string of killings in one of the world’s most dangerous countries for reporters, writes Al Jazeera.

Lourdes Maldonado Lopez was attacked on Sunday “with a firearm while she was in a vehicle” in the city, which borders the United States, according to the prosecutor’s office of the state of Baja California.

The killing comes less than a week after photojournalist Margarito Martinez was found dead with a gunshot wound to his head near his home in Tijuana. A local media rights group said Martinez had received threats from people connected to organized crime prior to the killing, although it remained unclear if the shooting was related to his work.

Maldonado Lopez, who had worked for several media outlets, had two years ago asked Mexican President Andres Manuel Lopez Obrador for “support, help and justice” as she feared for her life, according to a video republished on social media after news broke of her assassination.