Israel says that DOJ is investigating journalist Shireen Abu Akleh's killing

Yellow tape marks bullet holes on a tree and a portrait and flowers create a makeshift memorial, at the site where Palestinian-American Al-Jazeera journalist Shireen Abu Akleh was shot and killed in the West Bank city of Jenin in May. (Majdi Mohammed/AP)

JERUSALEM — The U.S. Department of Justice has launched an investigation into the fatal shooting of Al Jazeera journalist Shireen Abu Akleh, Israel confirmed Monday, condemning the probe as a "grave mistake" and vowing not to cooperate.

Israeli Defense Minister Benny Gantz made the statement on Twitter, saying Israel has made it clear to the U.S. "that we won't cooperate with any external investigation."