beirut lebanon army say friday arrest islamist militants plan attack country foreign embassies warn citizens avoid public place army intelligence carry several raid arrest 19 people link cell belong islamic state army say statement security force take extra precautions add cell plan prepare carry terrorist action lead egyptian fadi ibrahim ahmed base el-hilweh palestinian refugee camp southern lebanon army say lebanon interior ministry say early look warn issue foreign embassies potential attack country need panic warn base information foreign intelligence agency ministry say lebanese security service follow check authenticity accuracy ... cause fear exaggeration french embassy beirut urge french citizens lebanon friday vigilant next 48 hours cite elevate risk attack target public place u.s. embassy say early week bar staff visit casino du liban jounieh north beirut canada also warn citizens thursday avoid area lebanon say foil attack warn foreign embassies