Watchdog in question is Reporters Without Borders.

“The initial findings of the investigation show that the reporters were not collateral victims of the shooting,” the media watchdog Reporters Without Borders (RSF) said.

“One of their vehicles, marked ‘press’, was targeted, and it was also clear that the group stationed next to it was journalists.”

Their full report incl. timeline: “RSF video investigation into the death of Reuters reporter Issam Abdallah in Lebanon: the journalists’ vehicle was explicitly targeted”