The raids yesterday targeted two control centres, a communication complex and a landmine factory, the kingdom's SPA official news agency said.
The Saudi-led coalition, which has waged six weeks of air strikes in support of exiled President Abedrabbo Mansour Hadi, also destroyed other rebel positions in Saada province, which borders Saudi Arabia, SPA said.
Saudi Arabia warned Thursday that the Iran-backed Shiite Huthis had crossed a "red line" in shelling populated border areas in the kingdom.
Saada would be among the targets in the coalition's sights, he said, speaking just hours after the kingdom proposed a humanitarian ceasefire.