DOHA (AFP) - Qatar's foreign minister said on Tuesday (July 4) that demands put to Doha by Saudi Arabia and its allies in the Gulf diplomatic crisis were impossible to meet.

"The list is unrealistic and is not actionable," Sheikh Mohammed bin Abdulrahman Al-Thani told reporters in Doha.

"It's not about terrorism, it's talking about shutting down the freedom of speech," he said at a joint press conference after talks with German counterpart Sigmar Gabriel.

Saudi Arabia, the United Arab Emirates, Bahrain and Egypt - who accuse Qatar of supporting extremism - gave Doha an extra 48 hours to meet their demands after an initial 10-day deadline expired on Sunday.

These demands included Doha closing broadcaster Al-Jazeera as well as downgrading diplomatic ties with Iran.

Qatar officially handed its response to Kuwait on Monday, which is mediating in the dispute, but its contents have not been disclosed.

Sheikh Mohammed refused to give any further details on Tuesday, but said Doha was looking for a solution to the month-long crisis based on dialogue.

"The state of Qatar has adopted a very constructive attitude since the beginning of the crisis. We are tying to act mature and discuss the matter."

Gabriel, who visited Saudi Arabia on Monday, said he saw signs emerging of a chance to involve "international bodies" in the discussions and to get all sides involved in the dispute around the negotiating table.