Hundreds of Palestinian journalists have held demonstrations to mark three weeks since the disappearance of BBC correspondent Alan Johnston in Gaza City.

Mr Johnston, a seasoned reporter who has lived and worked in Gaza for the past three years, went missing on 12 March. He is widely believed to have been kidnapped.

In Gaza City, about 300 journalists protested outside the offices of Prime Minister Ismail Haniya, some of them with their mouths symbolically covered.

Other journalists, both Palestinian and international, turned out for a similar event in the West Bank city of Ramallah.

Palestinian journalists are staging a three-day boycott of the government and presidency to urge the authorities to do more to secure the safe return of Mr Johnston.

They have staged a number of protests in recent days to highlight his plight, as have journalists in the UK.