Sheikh Mohamed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the Armed Forces, visited Bahrain on Thursday for talks with King Hamad.
Sheikh Mohamed was welcomed by a guard of honour as he was greeted by the Bahraini king on his arrival at the neighbouring Gulf nation.
The two leaders later held talks at Al Sakhir Palace.
They discussed the deep ties between the two nations and agreed on their support for joint Gulf action. They also exchanged Ramadan greetings.
"I was pleased to meet with my brother, King Hamad bin Isa Al Khalifa in Bahrain," said Sheikh Mohamed, in comments reported by state news agency Wam.
"We reaffirmed the strong ties between our countries and discussed our shared interests to advance the security, stability and development of the Gulf along with our regional and international partners."
They also highlighted the importance of further developing trade and investment co-operation as well as working together on opportunities in technology, science, energy, renewable energy, environment, health and education.
Sheikh Mohamed attended an iftar banquet hosted by the king where a poem was recited by Sheikh Nasser bin Hamad, Bahrain's National Security Adviser and Representative of His Majesty the King for Humanitarian Works and Youth Affairs.
Also in attendance were Sheikh Hamdan bin Mohamed; Sheikh Mohamed bin Hamad, Advisor for Special Affairs at the Ministry of Presidential Affairs; Sheikh Sultan bin Hamdan, the UAE ambassador to Bahrain, and Dr Anwar Gargash, Diplomatic Adviser to the UAE President.
Dr Gargash, in a post on social media, said both countries have a deep and historic relationship with "a common destiny and one vision" for the good of the Gulf and Arab countries and people.
Sheikh Mohamed and King Hamad, meanwhile, meet regularly as part of the warm friendship between their countries.
In March, The two met at the Bahraini monarch's residence in Abu Dhabi to review bilateral relations.