Here is the statement from the British Embassy group who were missing in northern Ethiopia:
The four were taken to the British Embassy in Asmara
We are immensely happy that we have been released and would like to thank all those who have been involved in our release.
We are grateful for the efforts of the governments of Eritrea and Ethiopia and for all the work done by our colleagues at the Embassies in Addis Ababa and Asmara, and by the team in London.
We were treated well by our captors - physically we are all in good condition but obviously very tired.
One of the first things we all did after our release was speak to our families. It was great to be able to tell them that we are well after all they have had to go through in the last 13 days
We look forward to being reunited with our family and friends.
We recognise that there will be a great deal of interest in what happened to us. We need time to take stock of what has happened, and see our families and friends.
We ask that the media leave us and our families in peace to allow us to come to terms with our ordeal.
We are very worried that the Ethiopians who were accompanying us are all still being held.
We would not want anything to be said that might inadvertently jeopardise their safe release.
Our foremost concern is that they should be released as soon as possible.