Updated

Lebanese security officials and the state-run news agency say low-flying Israeli warplanes are violating Lebanese airspace, overflying territory including the capital Beirut.

The National News Agency says the warplanes flew over southern Lebanon, Beirut, the eastern Bekaa Valley and the city of Baalbek.

Israeli warplanes regularly enter Lebanese airspace. A security official confirmed the Sunday overflights and said they were among the most intense recently. He spoke on condition of anonymity in line with military regulations.

There was no immediate comment from Israel.

The flights come amid heightened regional tensions because of the civil war in Syria.

Israel is believed to have carried out three airstrikes inside Syria this year said to be aimed at weapons meant for the Lebanese Hezbollah.