UNITED NATiONS (AP) — The official in charge of President Donald Trump’s ceasefire plan for Gaza criticized Israel on Wednesday for its attacks on the war-battered Palestinian territory and warned that the alternative to the U.S. proposal is the next war.

Nikolay Mladenov, the Board of Peace high representative, insisted to the U.N. Security Council that Trump’s 20-point plan has not stalled and “has moved from the negotiating table to the engineering table.”