JERUSALEM (Reuters) - A senior Israeli official dismissed as  nonsense  on Tuesday a warning by Lebanese army s of possible aggression by Israel.  It s nonsense,  the official, who requested anonymity, told Reuters in response to Lebanon s army commander General Joseph Aoun urging  full readiness  at the southern border to face  threats of the Israeli enemy and its violations . Separately, the Israeli military said it had been holding a drill near Israel s border with Syria since Sunday. 