DOHA: Britain's top diplomat has welcomed a decision by four Arab countries to give Qatar more time to meet their demands.

Foreign Secretary Boris Johnson in a statement Monday also welcomed Qatar's decision to provide a response to mediator Kuwait on its position.

Saudi Arabia, the UAE, Egypt and Bahrain cut ties to Qatar early last month. They delivered a 13-point list of demands to end the standoff on June 22 and early Monday extended a deadline by 48 hours at Kuwait's request for it to comply.

Johnson called the deadline extension and Qatar's response "an important step in building confidence between the parties."

Meanwhile, a senior Turkish government official said the whole Gulf region could suffer if the crisis deepens.

Speaking to reporters Monday, Deputy Prime Minister Numan Kurtulmus also described the feud as an "artificially created crisis" and said the 13 demands were too stiff for any country to accept.

The list of demands includes an end to Turkey's military presence in Qatar.

"If this crisis is allowed to deepen, then not just one country but all of the countries of the region would pay the price," Kurtulmus said.

Kurtulmus reiterated that Turkey had no intention to shut down its military base in Doha.

"Turkey's base in Qatar is not just about Qatar's security it is about the security of the region," Kurtulmus said.

Turkey has sided with Qatar in the dispute, sending it food and other supplies and quickly ratifying legislation allowing the deployment of troops to the Turkish base.

In another development, Egypt said it will host a meeting of Arab nations that have cut off ties to Qatar.

Foreign Ministry spokesman Ahmed Abu Zeid said foreign ministers of Bahrain, Egypt, Saudi Arabia, and the UAE will meet in Cairo on Wednesday.

He said the meeting will discuss the future steps in dealing with Qatar. There will be an exchange of points of view and an evaluation of existing international and regional contacts.

Cairo will also play host to a meeting of a UN agency monitoring international air travel over a complaint by Qatar about its neighbors cutting off its air routes over the dispute. That meeting is due on Thursday.

Separately, Egyptian security forces have arrested the daughter and son-in-law of the Muslim Brotherhood's spiritual leader, who is in exile in Qatar.

A statement from the prosecutor said Yusuf Qaradawi's daughter Ola and her husband, Hossam Khalaf, were arrested in a Mediterranean coastal resort on Sunday over allegations of membership in a terrorist organization. On Monday, they were ordered detained for 15 days pending investigation.

Egypt branded the Brotherhood a terrorist organization after the 2013 ouster of President Mohammed Morsi, a member of the group. Thousands of Brotherhood members have been killed and arrested since in a sweeping crackdown.

Qaradawi was sentenced to death in absentia. He is on a sanctions list by Egypt, Saudi Arabia, UAE and Bahrain.