The vessel was sailing empty of cargo from Vietnam to Israel, one of the sources said, adding that there were no injuries. The strikes have raised fears of a regional escalation, as exchanges of fire continued over Israel’s border with Lebanon. Israel said one of its troops was “slightly injured” in an exchange of fire along the country’s border with Egypt late Monday, which Cairo attributed to drug smuggling. One person in Egypt was killed. Gaza’s press office said Tuesday morning that Israeli strikes had killed another 78 people overnight.