Hezbollah's Manar TV station has reported a blast in southern Lebanon, saying Israel remotely detonated a spying device planted in the area.
The report Friday said there were no injuries.
There was no immediate comment from Israel.
On Tuesday, rockets fired from Lebanon struck northern Israel for the first time in more than two years, drawing a burst of Israeli artillery fire across the tense border.
No casualties or major damage were reported on either side.
Israel and the Shiite militant group Hezbollah fought a monthlong war in the summer of 2006.