Qatar has confirmed the arrest in the United Arab Emirates of two of its citizens, described as "spies" by Emirati media, adding to tension between the Gulf neighbors.

Hamad Ali al-Hamadi and Yousef Abdelsamad al-Mulla were arrested on June 27 at the Ghweifat border crossing between Saudi Arabia and the UAE, a Qatari foreign ministry spokesman said in a statement.

The U.S. Treasury placed a United Arab Emirates company on its sanctions blacklist Wednesday for selling specialty oil products to the Syrian government.

Boosting the pressure on the regime of Bashar Assad, the Treasury at the same time named for sanctions two alleged front companies for Syria's Scientific Studies and Research Center (SSRC).

Authorities in the United Arab Emirates have arrested Qatari "spies," an Emirati daily reported on Wednesday in a new sign of mounting tensions between Doha and its Gulf neighbors.

The report in Al-Khaleej newspaper, which cited Emirati sources, was in response to a report in Qatar's Al-Arab daily that three Qataris had been subjected to "arrest and torture" in UAE capital Abu Dhabi.

Dubai is planning to build a temperature-controlled city featuring the world's largest mall and an indoor park, as well as hotels, health resorts and theatres, the developer said.

Already home to one of the globe's biggest indoor shopping complexes, Dubai Mall, the glitzy emirate known for its love of grandiose projects said it is now planning to build the "Mall of the World".

A police officer died in a "terrorist" blast in a Shiite-populated village in the Sunni-ruled Gulf kingdom of Bahrain, an interior ministry official announced Saturday.

Dubai's Emirates Airlines said Wednesday it has suspended flights to Peshawar, in northwest Pakistan, after gunmen opened fire at a landing plane killing a passenger and wounding two crew members.

"Emirates has suspended flights to and from Peshawar effective 25 June 2014 until further notice, due to the security situation at the destination," an Emirates statement said.

A UAE top court jailed Monday six Arabs for seven years after convicting them of forming an "al-Qaida" cell and raising funds for Al-Nusra Front, the jihadist network's Syrian affiliate.

The state security court found the group guilty of "joining al-Qaida terrorist organization and setting up a cell in the UAE... and collecting money to support Al-Nusra Front, to finance terrorist activities outside" the UAE, WAM state news agency said.

The United Arab Emirates urged its citizens on Saturday to refrain from traveling to Lebanon citing the country's “shaky security situation” as a cause.

"Emiratis currently present in Lebanon must leave the country immediately,” UAE's charge d'affaires Hamad Mohammed al-Junaibi said.

The United Arab Emirates said Wednesday it had recalled its ambassador to Iraq for consultations over the growing unrest and slammed the Shiite-led government's "sectarian" policies.

A foreign ministry statement voiced "serious concern" about "exclusionary and sectarian policies that marginalize essential components of the Iraqi people," in reference to the Arab Sunni minority.

The UAE and the United States agreed on Monday to cooperate to prevent "terrorist" groups from using the Gulf state's finance sector, according to a statement from the U.S. Treasury.

Treasury Secretary Jacob Lew and Abu Dhabi's Crown Prince Sheikh Mohammed bin Zayed al-Nahyan agreed to cooperate more closely "to disrupt terrorist support networks" in talks in Abu Dhabi.