United Nations Secretary-General Antonio Guterres will tell a U.N. meeting later on Wednesday that in the search for solutions in the Gaza Strip after the war between Israel and Palestinian militants "we must not make the problem worse," his spokesperson said after U.S. President Donald Trump proposed that the U.S. to take over war-ruined enclave. "It is vital that we stay true to the bedrock of international law. It is essential to avoid any form of ethnic cleansing," Guterres will say, said U.N. spokesperson Stephane Dujarric, adding that he would also reaffirm the two-state solution.