Iranian Foreign Minister Manouchehr Mottaki has warned against foreign intervention in the conflict between the Yemeni government and rebels.
Unidentified parties were adding fuel to the crisis, and attempts to help or to take military action would have negative consequences, Mr Mottaki said.
Correspondents say his comments appear to have been intended for Saudi Arabia.
Shortly afterwards, Riyadh promised it would continue air strikes until the rebels moved back from its border.
“We are not going to stop the bombing until [they] retreat tens of kilometres inside [the Yemeni] border,” Deputy Defence Minister Prince Khaled Bin Sultan said, according to the AFP news agency.
