Meanwhile, a senior Iranian military official warned the US-backed coalition against blocking a Yemen-bound Iranian aid ship, saying that such a move would "spark a fire" in the region.
Today's airstrike in Yemen's Abyan province was in response to an attempt by the rebels known as Houthis to reinforce their forces in the nearby city of Aden, a port city on the Arabian Sea, said Yemeni security officials.
However, continued ground fighting was reported in some areas shortly after the cease-fire came into force last night, with security officials and witnesses saying fierce combat broke out when the rebels sought to storm the southern city of Dhale, firing tank shells, rockets and mortars.
The officials and witnesses all spoke on condition of anonymity because they were not authorized to speak to the media.
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A Saudi Defence Ministry statement accused the Houthis of violating the ceasefire Wednesday morning by firing toward the Saudi border areas of Jizan and Najran.
Saudi Arabia and its coalition of Sunni Arab countries began the airstrikes to break the advance of the Houthis and forces loyal to former President Ali Abdullah Saleh, who overran the capital, Sanaa, and much of northern Yemen late last year and have been on the offensive in the south.
The Saudis and their allies are seeking the restoration of the Western-backed President Abed Rabbo Mansour Hadi, who fled the country in March in the face of the Houthis' advance
"I bluntly declare that the self-restraint of Islamic Republic of Iran is not limitless," Jazayeri, the deputy chief of staff, told Iran's Arabic-language Al-Alam state TV yesterday.
"Both Saudi Arabia and its novice rulers, as well as the Americans and others, should be mindful that if they cause trouble for the Islamic Republic with regard to sending humanitarian aid to regional countries, it will spark a fire, the putting out of which would definitely be out of their hands.