Yemen's Houthi group warned employees and civilians near Saudi Arabia's oil facilities and airports to evacuate after the Saudi-led coalition issued an evacuation order in Sanaa.
The group threatened retaliation if military operations continued.
Houthi spokesman Yahya Saree issued the warning on Tuesday after the coalition called on civilians to leave Yemen's Oil Company al-Sabah central station in Houthi-controlled Sanaa before a planned operation.
"a legitimate target" said Yahya Saree, the Houthi spokesman.
The warning followed reports from Al Jazeera's team in Sanaa that explosions were heard after the evacuation order.
Houthi-affiliated media reported that Saudi-backed forces struck an oil facility in the al-Sabaha area of the capital.
Saree said Houthi fighters were confronting Saudi-backed forces in Sanaa and warned that any strikes on the city would trigger a response against Riyadh.
"harsh and painful" said Yahya Saree, the Houthi spokesman, describing the response he said would follow attacks on Sanaa.
In a statement on X, Saree said the Houthis would target locations included in the evacuation warning if the coalition proceeded with an attack on Sanaa.
The warned locations included Aramco's headquarters in Dammam, King Khalid International Airport and an Aramco-linked refinery in Riyadh.
According to reports cited by Al Jazeera, an attack on King Khalid International Airport on Saturday killed at least 13 people and injured more than 300 others.
Another projectile strike at the airport in Riyadh on Sunday killed one person and wounded 11.
Several international airlines suspended flights to Saudi Arabia and neighboring countries after the weekend attacks, including Air France-KLM, Air India, Etihad, Lufthansa, Delta, Gulf Air and Qatar Airways.
Saudi Arabia's coalition said its forces intercepted three drones north of Riyadh on Tuesday.
The kingdom has backed Yemen's internationally recognized government and launched strikes against the Houthis in recent weeks.
The Saudi-backed Yemeni government counteroffensive has been described by the source as "Dawn of Yemen" after the Houthis seized strategic territory along the Red Sea coast last month.
