The secretary general of the Gulf Cooperation Council on Friday called on all parties in Yemen to end fighting, saying no one is benefitting.

"The council states call on all parties to stop fighting immediately to stop bloodshed," Abdulattif al-Zayani said in an interview with Al Arabiya TV, adding that Gulf Arab states, who are trying to help broker a power transition deal, are ready to exert all efforts to help Yemen.

"The ministerial council of the GCC is following with concern and sadness the deteriorating situation and the continued fighting. This situation is regrettable and benefits no one."

Deadly street fighting in Yemen's capital widened on Friday and the presidential palace was hit by shelling.