The website of the Lebanese Ministry of Foreign Affairs and 20 of the country’s embassy websites were breached on Sunday by pro-Saudi hackers, who posted a message warning Lebanon of an imminent war with Saudi Arabia.

The hackers, who refer to themselves as “Bad Dream,” posted a disparaging image of Hassan Nasrallah - the leader of the Iranian-backed Lebanese militant group Hezbollah, and a photo of Saudi King Salman and Crown Prince Mohammed bin Salman, along with the threatening message (in Arabic):

“The decisive storm is coming to Lebanon” - a reference to Saudi Arabia’s military intervention in Yemen, which aims at pushing back the Iran-backed rebels.

The motives behind the hack and the method used to access the official websites are still unknown.

The hack comes amid rising tensions between Saudi Arabia and Lebanon, following the surprising resignation of Lebanese Prime Minister Saad Hariri last week.

Hariri said in an exclusive interview with Future TV on Sunday that he is not being held in Riyadh, where he announced his resignation in a televised address, and claimed that he will be returning to Lebanon “within days.”

Concerns are rising that Lebanon could once again descend into violence, especially after on Thursday, Saudi Arabia urged its citizens to leave Lebanon immediately.