The exiled chief of the Hamas movement on Friday vowed to take revenge on behalf of Sudan, which has accused Israel of bombing a military factory in the heart of its capital, official media said.
"Soon you will hear good news," the state SUNA news agency quoted Khaled Meshaal as saying at the Sudanese Armed Forces mosque.
Meshaal, a frequent visitor to Sudan, on Thursday addressed a conference of Sudanese Islamists. He told them that Israel would never defeat Gaza, the Hamas-ruled Palestinian territory against which Israel has launched its biggest military campaign in nearly four years.
The operation began with the targeted killing of Hamas military chief Ahmed Jaabari on Wednesday.
Since then, militants have fired around 300 rockets over the border.
Israeli war planes carried out multiple new air strikes on the Gaza Strip Friday, AFP reporters and Hamas security sources said.
Officials in the Jewish state have expressed concern about arms smuggling through Sudan and have long accused the African country of serving as a support base for Hamas militants.
Sudan blamed Israel for sending four radar-evading aircraft to strike the Yarmouk military factory in Khartoum at midnight on October 23, and then said Israel was spreading "fabricated information" about links between the military factory, Hamas and Iran.
Meshaal on Thursday said Sudan is "on the top" among supporters for the Hamas armed wing, the Ezzedine al-Qassam Brigades.
Israel refused all comment on Khartoum's accusation that it bombed the Yarmouk facility.