According to Haaretz:

The Israel Defense Forces on Monday said it believed Hezbollah guerrillas in Lebanon attempted to fire an Iranian-made missile with a range of 200 km at Israel which malfunctioned and fell onto Lebanese territory.
The falling missile, described as a Zilzal, was the likely source of Lebanese reports that an Israel Defense Forces aircraft had been hit and brought down over Lebanon.
The IDF denied that one of its aircraft had been downed over Lebanon, despite Lebanese media reports. “There was no such thing,” a military source said.