Fighting is escalating in the north of Yemen where government forces have been battling Houthi rebels for months.

In recent weeks, Saudi Arabia has been drawn into the conflict, vowing to continue air and artillery strikes across the border with the aim of establishing a buffer zone.

Now, the Houthi fighters have released video footage which they say shows Saudi bombardment of the Doukhan mountains in the north of Yemen.

Hashem Ahelbarra reports from north Yemen.