Baghdad, Iraq ? The Paris-based advocacy group Reporters Without Borders on Thursday urged Iraqi authorities to step up efforts to protect journalists here after, it said, six journalists and media workers were killed in less than a week.

The group issued a statement calling on the Iraqi government to bring the killers to justice and noted that the recent string of slayings came less than a month after the U.N. Security Council adopted a resolution on the protection of journalists.

The U.N. Security Council on Dec. 23 condemned attacks on journalists during armed conflicts and urged combatants to stop singling out members of the media.

The resolution, adopted unanimously, marked the first time that the United Nations’ most powerful body dealt specifically with journalists covering wars.