BRUSSELS, June 7 -- Three days after Hezbollah rejected the ceasefire its own government had agreed to, the European Union stepped into the vacuum on Sunday with a statement that did something few European diplomatic texts bother to do: it called out the armed group by name and told it the deal is not open for renegotiation.

EU foreign policy chief Kaja Kallas, speaking on behalf of the bloc, said the ceasefire reached on June 3 between Israel and Lebanon in US-brokered talks at the State Department represents what she called "a chance to prevent a return to full-scale hostilities." The agreement, struck after more than eight hours of negotiations in Washington, was contingent on a complete halt to Hezbollah fire and the staged deploymen...