Prince Muqrin bin Abdulaziz, a former intelligence chief in the Kingdom, has been appointed deputy crown prince.
Saudi Arabia, the UAE and Bahrain have accused Qatar of disregarding an accord not to interfere in fellow Arab states’ internal affairs.
Sisi toppled Mohamed Mursi of the Muslim Brotherhood last July after mass protests against his rule and has emerged as an influential figure.
Saudi, the UAE and Bahrain recalled their ambassadors from Qatar three weeks ago, accusing it of interfering in fellow Arab states’ internal affairs.
The comments by Qatar’s emir, Sheikh Tamim bin Hamad al-Thani, were the first official Qatari reaction after Iraq accused Doha and Riyadh of funding insurgency.
Washington’s preliminary nuclear deal with Iran last year caused tensions between the US and Saudi.
Iran and Syria are the main issues for discussion at the summit, scheduled to take place in Kuwait on March 25-26.
It was not immediately clear who planted the bomb or the extent of the damage.
The U.S. has abandoned efforts to arrange a summit with Gulf Arab leaders due to divisions with the group of its regional allies, officials said.
The 13 sentenced to between three and 14 years in prison were nine Saudi citizens, two Jordanians, an Egyptian and a Syrian.
Saudi, the UAE and Bahrain recalled their ambassadors from Qatar on March 5, citing policy differences.
The move follows the withdrawal of the Saudi, UAE and Bahraini ambassadors from Doha last week over foreign policy disagreements.
He also blamed both countries for launching Syria’s three-year civil war through al Qaeda-linked groups.
The strategy includes 100 initiatives in transport, communications, infrastructure, electricity and urban planning.
The two children, aged 10 and 11, had been instructed by “terrorists” to plant a bomb in Daih, a ministry statement said.
The UAE has passed a new ruling exempting citizens from 13 European member states from requiring a pre-entry visa.
They accused Doha of not implementing an agreement among GCC countries not to interfere in each others’ internal affairs.
A bomb detonated during a protest in a village west of the capital Manama.
Mursi and his Brotherhood comrades are charged with breaking out of jail during the 2011 uprising against Hosni Mubarak.
Ambassador for the UK’s financial sector wants to see more women at senior management and board level.
The men had been also convicted of chanting slogans against the Kingdom.
As part of an interim agreement, Tehran curbed some nuclear activities for six months in return for limited sanctions relief.
Mursi is on trial in three cases and charged in two others.
Qatar has been under fire for its treatment of migrant workers in the construction industry.
UAE officials say procedures for exemption are almost complete.
Under the new initiative, the government will “compete with the private sector” in terms of the caliber of service it provides.
Estimations suggest some 1,200 Saudis have joined Islamist militants involved in Syria’s civil war.
Lawmakers want to investigate all deals agreed by Kuwait Airways, which is attempting the biggest overhaul of its fleet since 1990.
Offenders will face a jail sentence of up to seven years and a fine of up to $26,500.
Saudi Arabia’s intelligence chief has said the kingdom is looking at a “major shift” in relations with the United States.