UN Special Envoy to Yemen Hans Grundberg has visited Riyadh to discuss the expansion of the truce between the government and the Houthis with Saudi and Yemeni officials.

The UN-brokered truce, which began in April and has been extended three times in two-month increments, will expire on October 2.

UN officials hope that this iteration of the truce will be expanded beyond two months.

Grundberg said to Al Jazeera on Monday he is waiting for the warring parties to respond to a UN proposal for expanding the truce.

“We are entering a sensitive period where we're only less than nine days away from the end of the month of October — we had provided to all parties a proposal for a longer truce and what we want is for them to have a full commitment to see this achievement through and to find a political track for a permanent solution,” Grundberg said.