One of the sources said the operation was in response to the attack, but there was no immediate statement from Hezbollah.An Israeli military spokesman said Israeli troops had "thwarted an infiltration attempt by a Hezbollah terror squad" across a boundary with Israeli-occupied territory, and that there were no Israeli casualties. "Shortly after they crossed the Blue Line, we engaged," the spokesman said.He said the squad, numbering between three and five militants, had crossed back into Lebanon. Lebanese sources said there were no Hezbollah casualties.

One Lebanese source said Hezbollah had fired a guided missile at an Israeli tank.However, Israeli military spokesman Lieutenant-Colonel Jonathan Conricus told reporters that he was unaware of any such incident.The incident occurred in the Shebaa Farms area, which is occupied by Israel and claimed by Lebanon.