Arab intelligence sources estimate that the Houthis in Yemen are planning to attack vital targets inside Saudi Arabia using missiles and drones as they have done in the past, Kan News reports

Security around the king, Salman, and the Saudi crown prince, bin Salman, has been increased. This means there is concern about a direct strike on the Saudi royal family if a situation arises involving combined attacks by Iran and the Houthis against the kingdom.
In the background of all this is the possibility that Saudi Arabia will be forced to take military action against Iran.
A source in the Saudi royal family said if the Houthis in Yemen join Iran in attacks against us, we will strike back at them; this is a red line.
Regarding direct intervention by Saudi Arabia and the Gulf states against Iran, the same Saudi source tells me that at the present time, we are letting the United States and Israel exhaust their moves against Iran.
According to him, a military move by the Gulf states against Iran would have dramatic implications for oil prices.
In the same breath, that same Saudi source also warns that if the current situation of Iranian attacks continues over time and the attacks intensify, a reassessment may be necessary.