The club says no players have been affected.
Manchester United are experiencing a Covid-19 outbreak among their coaching staff.
At least three members of Ole Gunnar Solskjaer's team are reported to have tested positive for the virus, according to a
Daily Mirror exclusive.
The affected members of staff are thought to have tested positive for coronavirus before United's 4-0 demolition of Real Sociedad in the Europa League, and therefore did not travel to Turin for the fixture.
United are refusing to name the affected coaches but insist no players have returned positive tests.
The match between Manchester United and Newcastle United on Sunday evening will go ahead as planned.
Solskjaer will be joined by Nicky Butt and youth coach Mark Dempsey in the dugout at Old Trafford, a club statement confirmed.
"Nicky Butt and Mark Dempsey will join Ole Gunnar Solskjaer on the bench this evening due to some of the coaching staff having to self isolate," the statement read.
"The home Premier League game against Newcastle United at Old Trafford will kick off at 7pm."
