United Nations, Sept. 12 -- The Israeli attack on Qatar potentially opens a new and perilous chapter in the Gaza conflict, seriously threatening regional peace and stability, warned UN Under-Secretary-General for Political and Peacebuilding Affairs Rosemary DiCarlo on Thursday.

Israeli airstrikes in Doha, Qatar, on Tuesday shocked the world. It was an alarming escalation, especially since it targeted individuals who were reportedly gathered to discuss the latest U.S. proposal for a ceasefire and hostage release deal in Gaza, DiCarlo told the Security Council in a briefing.

The sovereignty and territorial integrity of any country, including Qatar, a valued partner in advancing peacemaking and conflict resolution, must be respected, she sai...