Ukrainian President Volodymyr Zelensky arrived in Saudi Arabia on Friday for talks with crown prince Mohammed bin Salman in his second trip to the country in recent weeks.
Zelensky has brokered closer ties with several states in the Gulf amid the US-Israeli war with Iran, striking defence deals -- including with Riyadh -- to share Kyiv's expertise in downing drones, gained through fending off over four years of Russian attacks.
A senior Ukrainian official speaking on condition of anonymity told AFP Zelensky had landed in Jeddah to to "continue discussing security cooperation".
During his visit last month, Zelensky said the two sides had "reached an important arrangement" on air defence.
The deal envisaged a decade-long cooperation on defence, including establishing joint production lines, he said.
Kyiv has dispatched dozens of military specialists and drone interceptors to several countries in the region, where they were used to shoot down incoming Iranian drones.
It touts its anti-drone defences as the best in the world.
Saudi Arabia has maintained good relations with both Kyiv and Moscow, and has also hosted talks with US officials searching for an end to the Russian invasion.