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The Yemeni Houchi group warned its workers and civilians to stay away from Saudi oil facilities when the militia continued to attack the royal nation.

The group has also declared Saudi airspace unsafe, except above Mecca and Medina, in the midst of increasing military tension in the region.

The warning was delivered through the news office of Saba managed by Houthi by quoting a military source of the group.

"Saudi airspace is not safe, unless above Mecca and Medina," said the military's source.

The source also warns those who have received threats not to ignore them. However, Houthi does not detail the form of the threat as well as the military actions they may do.

In addition, Houchi urged Saudi oil shareholders, Aramco, to sell their shares to avoid potential losses.

"To avoid loss, we advise the Aramco shareholders to withdraw their shares before it's too late," said the source.

The alert appeared after a number of security incidents occurred in Saudi Arabia. Saudi Civil Defense previously reported six people injured after a projectile hit a residential area in Nakran City, reporting Middle East Monitor.

Saudi coalition leaders have also announced that they have intercepted and destroyed two ballistic missiles launched Houthi to Khamis Mushait, a city in Saudi Arabia.

The series of incidents added tension between the Saudi coalition leaders and the Houthi group which increased since early October.

Saudi coalition leader reportedly announced "large-scale operations" to target Houthi's military abilities.

In return, the group launched an attack on missiles and drones targeting airports and facilities in Saudi Arabia.