Updated

The Israeli military says four troops were wounded in an explosion near the frontier with Lebanon.

The military said Wednesday that the soldiers were hurt during "overnight activity adjacent to the northern border." It did not say if they were injured in training or in combat, and refused to elaborate further.

Lebanese security officials, speaking anonymously as they are not authorized to talk to the media, say seven explosions were heard from the Israeli side of the border

But a TV station close to Lebanon's militant Hezbollah group, al-Mayadeen, said the soldiers were wounded inside the Lebanese border village of Labbouneh.

Israel fought a month-long war with Hezbollah in 2006 and sometimes there are cross-border exchanges of fire.

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Bassem Mroue contributed to this report from Beirut.