The club has issued this statement: 'United Manager Martin Ling is currently being treated for a debilitating illness. He is receiving specialist care and, while we are able to report that his is making some progress, it is anticipated that Martin will be away from work for several weeks.
'Club and the League Manager's Association are fully supportive and are looking forward to his return.
'In the meantime, United officials have held talks with assistant manager Shaun Taylor and we have agreed to actively seek an experienced coach to help Shaun with the running of the team. This process has already begun in earnest.'
More top news
A selection of images from Glastonbury Festival where the music has begun and weird and wonderful things are going on
A Jack Russell has been reunited with his owners after slipping on a cliff near Plymouth. He was spotted in the water by coasteerers
Showers have made an appearance for most of us today but have been heavier for some than others. Our weather presenter explains...