Shells strayed across Lebanon\'s northern borders late on Thursday crashing into two villages in the remote province of Akkar straddling the Syrian frontiers, the local official media reported on Friday.  The shells crashed into the villages of Al-Nora and Al-Debbabiah, without causing casualties.  Such incidents have recently increased, prompting President Michel Suleiman to voice concern and assert necessity of \"respecting the two countries\' sovereignties.\" The Lebanese Army has enforced stringent security precautions at some points along the Lebanese-Syrian border line.