Notts County player/coach Alan Smith has taken caretaker charge of the first team following John Sheridan’s departure.
The former Leeds and Manchester United man will occupy the role until a permanent manager has been appointed.Mark Crossley will continue in his role as assistant manager.
Smith said: “The most important thing right now is for everyone - players, staff and fans - to stick together.
“There’s no getting away from it, it’s been a very, very disappointing season so far. But there are lots of points still to play for and we are determined and confident of putting things right.
“The fans are doing their bit. Our following at Cambridge, given our recent form, was phenomenal. As players and staff we have to repay that loyalty.
“We have some huge games coming up, starting at Morecambe on Saturday and, until a new manager arrives, I will be working closely with Mark and the rest of the staff to hopefully lead an upturn in our fortunes.”