BRUSSELS (AP) — European Union leaders assessed more measures to counter the spread of coronavirus variants during a video summit Thursday as the bloc's top disease control official said urgent action was needed to stave off a new wave of hospitalizations and deaths. Expressing great concern about the virus' mutations, the 27 leaders looked at further border restrictions like limits on all non-essential travel, better tracking of mutations and improving coordination of lockdowns, worried that another surge of deaths across the EU was imminent. But they could not immediately agree on a decision. “It is of great importance not to travel, but you cannot immediately enforce this legally," Dutch Prime Minister Mark Rutte said after the conference call.