The UN Special Envoy Martin Griffiths (C) arrives at the Sanaa International Airport in Sanaa, Yemen, on April 8, 2019. The UN Special Envoy Martin Griffiths arrived in Yemen's rebel-held capital Sanaa on Monday to push Houthi rebels for implementing Stockholm Agreement. (Xinhua/Mohammed Mohammed)

SANAA, April 8 (Xinhua) -- The UN Special Envoy Martin Griffiths arrived in Yemen's rebel-held capital Sanaa on Monday to push Houthi rebels for implementing Stockholm Agreement.

However, rebels prevent journalists from meeting the UN envoy at Sanaa Airport upon his arrival.

A peace deal reached between Yemeni warring parties in December last year has hit a deadlock, as the rebels refuse to implement the deal and withdraw from Hodeidah port city.

Hodeidah is the lifeline for Yemen's most commercial imports and humanitarian aid.

Griffiths has been shuttling between the Iranian-allied Houthi rebels in Sanaa and the Yemeni government in the Saudi capital Riyadh to end over four years of civil war, which erupted after the rebels seized much of the country's north in late 2014.