Saudi Arabia and three other Arab states have extended the deadline for Qatar to accept a list of demands by 48 hours, or face further sanctions.
The initial deadline for Qatar to agree to the group’s 13 demands, including the shutting down of the Al Jazeera news network, expired on Sunday.
The Gulf state, which denies funding extremism, has given a formal response, but details have not been released.
It has already called the demands an “affront to international law”.
The requirements include the closure of a Turkish military base in Qatar and the curbing of diplomatic relations with Iran.