The search for a diplomatic solution to the Gulf crisis intensified Wednesday as Turkey's foreign minister landed in Qatar while the UN voiced fears over growing humanitarian concerns in the region.

Confrontation between Qatar and Saudi Arabia is creating unease among Syrian rebels who expect the crisis between two of their biggest state backers to deepen divisions in the opposition to President Bashar al-Assad.

The United Arab Emirates and Bahrain appear to be violating people's human rights by threatening to jail or fine them for expressing sympathy for Qatar, U.N. human rights chief Zeid Ra'ad al Hussein said on Wednesday.

There are no apparent plans by Arab states to propose that names from their Qatar blacklist be subjected to United Nations sanctions, diplomats said on Wednesday.

Bahraini authorities detained a citizen for questioning on charges of sympathizing with Qatar on social media, state news agency BNA reported on Wednesday.

The ambassadors of the Kingdom of Saudi Arabia, the UAE, Egypt and Charge d’ Affaires of the Bahraini embassy to Tunisia met yesterday Tunisian Foreign Minister Khmais Al-Jehinawi.

The diplomatic crisis surrounding Qatar and other Gulf countries has remained a peaceful one for now, but open warfare has been declared in the media -- both traditional and social.

Qatar, the world's second largest helium producer, has closed its two helium production plants because of the economic boycott imposed by other Arab states, industry sources told Reuters on Tuesday.

Egypt will allow airlines and aircraft that are not registered in Egypt or Qatar to use its airspace to fly to and from Qatar, the civil aviation ministry said on Tuesday - an easing of restrictions imposed in a Saudi-led diplomatic isolation of Qatar.

Qatar said on Wednesday it had withdrawn its peacekeeping troops from the disputed frontier between Djibouti and Eritrea, after the two East African countries sided with Saudi Arabia and its allies in their standoff with Qatar.

King Hamad bin Isa Al Khalifa arrived in the Emirati capital, Abu Dhabi, on Tuesday (June 13, 2017) to meet the Crown Prince Mohammed bin Zayed Al Nahyan and Dubai ruler Mohammed bin Rashid Al Maktoum.

The U.S. ambassador to Qatar said Tuesday she is leaving her post in Doha, in the midst of the worst diplomatic crisis involving America's Gulf allies in years.

Turkey, a strong ally of Qatar, will send its foreign minister to Doha on Wednesday and then if possible to Saudi Arabia in a diplomatic push to help end a bitter feud between the emirate and a number of other Arab countries.

The United Arab Emirates' ambassador to the United States said on Tuesday there was no military aspect to steps taken by Arab powers against Qatar, which they accuse of supporting terrorism.

Turkish President Tayyip Erdogan on Tuesday denounced the isolation of Qatar by neighboring states as a violation of Islamic values and akin to a "death penalty" imposed in a crisis that has reverberated across the Middle East and beyond.

Saudi Foreign Minister Adel al-Jubeir said his country was ready to provide food and medical aid to Qatar if needed, Sky News Arabia reported, a week after Riyadh and other Arab capitals cut ties with their Gulf neighbor.

Russian President Vladimir Putin and Saudi Arabia's King Salman discussed the Qatar crisis in a phone call on Tuesday, the Kremlin said in a statement.

Morocco said it would send plane-loads of food to Qatar to boost supplies thereafter Gulf Arab states cut diplomatic and economic ties with Doha.

The Qatari Al-Arab newspaper said that a Bahraini lawyer has filed a lawsuit against his government to cancel the latest political measures taken against Qatar.

U.S. Defense Secretary Jim Mattis said on Monday that the blockade against Qatar by Gulf states including Saudi Arabia was a "very complex situation" and it was an area where common ground had to be found.