Speaking to reporters on Saturday, Rubio expressed concern over video footage showing Washington Post photojournalist Heidi Levine being assaulted during an incident on Friday. Levine was among at least two people injured as Israeli settlers attacked Palestinian civilians in the West Bank. European diplomats and a French mayor were also attacked, according to Belgium's foreign minister.
"We're very disturbed by those images and what we're seeing," Rubio said, adding that Washington had repeatedly asked Israeli authorities to crack down on such violence.
The US State Department has requested information about the incident involving Levine and is awaiting further details from the American Embassy in Jerusalem. Rubio said he expected to receive an update by Sunday.
The comments come amid a sharp increase in reported settler violence across the occupied territory, coinciding with the annual Palestinian olive harvest. According to Israeli settlement monitoring organisation Yesh Din, settlers have carried out at least 170 attacks against Palestinians since September 27.
The incidents have raised concerns over the safety of Palestinian communities and foreign nationals operating in the territory. Washington's latest intervention highlights growing pressure on Israeli authorities to address settler violence, particularly following attacks involving American citizens and European representatives.