In his last visit to Yemen, Griffiths held a press conference in Sana’a International Airport, in which he reiterated the need for an end to the restrictions that have exacerbated the humanitarian crisis in the impoverished country.
Observers said Griffiths' statement did not bring anything new and he looked desperate as he reached a dead end especially regarding the humanitarian situation in Yemen.
They believe that Yemenis will reach peace without foreign intervention.
Earlier, Griffiths met with the leader of Yemen's Ansarullah movement Abdul-Malik al-Houthi.
Al-Houthi criticized the role of the UN regarding the continued Saudi blockade on Yemen and the illegal detention of Yemeni oil ships saying the blockade is a clear violation of international law.
Yemenis say there will be no talks before lifting the siege on their country and ending the humanitarian crisis. They believe that the UN serves the interests of the US-backed Saudi-led coalition as there are no tangible results for its claimed efforts.