Sheikh Mohammed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the Armed Forces, touched down in Riyadh on Wednesday for talks with Saudi Arabia's rulers.
In a post on Twitter, Sheikh Mohammed said he would look at ways to strengthen ties with Saudi and discuss regional and international issues.
He was met from his plane by Mohammed bin Salman, Crown Prince of Saudi Arabia, with the two leaders pictured walking hand in hand.
He later met with King Salman, according to images posted on Twitter by Sheikh Mohammed bin Zayed.
Also accompanying him was Sheikh Mansour bin Zayed, Deputy Prime Minister and Minister of Presidential Affairs.
State news agency WAM reported that the parties also discussed the latest developments in Yemen and efforts to defeat the Iran-backed Houthi militias, and the aggressive and terrorist armed organisations that threaten Yemeni people and regional and international stability.
Abu Dhabi's Crown Prince emphasised that the UAE, under the leadership of President Sheikh Khalifa, stands with the Kingdom of Saudi Arabia in facing all challenges confronting the region's problems in unity.
"The UAE and Saudi Arabia are fully aware of the sensitivity, challenges, and risks facing this region, and its future and the future of its nations and their peoples," Sheikh Mohammed was quoted by WAM as saying.
"Therefore, the historical and shared responsibility of the two countries towards changes and developments are based on a solid foundation of cooperation, understanding, and synergy. The Arab alliance is only one aspect of the successful work which contributed, thankfully, to putting an end to the deterioration of the security system in the region."