The bomb exploded without any prior warning. 炸彈在沒(méi)有任何事先警告的情況下爆炸了。
US ambassador Charles Reis said that while damage was "not extensive", the attack, which came without warning, was being treated seriously. 美國大使查爾斯雷斯說(shuō),這次事件的危險雖然不大,但是沒(méi)有事先警告的攻擊必須得到嚴肅的對待。