Norwich City manager Daniel Farke has confirmed that Republic of Ireland striker Adam Idah is one of the three members of personnel at the club to have tested positive for Covid-19.
Norwich are the latest Sky Bet Championship side to experience positive results during this week's round of testing after Derby, Sheffield Wednesday and Middlesbrough also had their preparations for FA Cup ties impacted by coronavirus cases.
Speaking at a pre-FA Cup third round press conference, Canaries boss Farke said: "Tim Krul is one of the positive cases, and the second player is Adam Idah."
An official club statement read: "Norwich City can confirm that the club's latest round of Covid-19 testing across players and backroom staff has returned three positive results.
"Players and backroom staff were tested and results received over the early stages of this week.
"In line with government, EFL and club protocols, all three individuals immediately began a period of self-isolation."
The Championship leaders are set to host divisional rivals Coventry at Carrow Road in the FA Cup third round on Saturday, but will be without their goalkeeper Krul, while Idah, who recently extended his contract until 2024 has been absent with a knee injury sustained during Ireland's UEFA Nations League defeat to Wales last November.
Krul said on Twitter: "Earlier this week I was informed by the club that my Covid test came back positive. I immediately began my self-isolation period.
"I feel under the weather and fatigued. It's an important reminder to stay safe, this virus is not a hoax and to protect those around us."
Meanwhile, Manchester United confirmed that teenager Facundo Pellistri has tested positive for coronavirus.
The 19-year-old joined from Penarol in Uruguay in October and has been playing with the development team as he gets use to life in England.
Pellistri could have featured in Saturday's FA Cup third-round clash against Watford, but manager Ole Gunnar Solskjaer confirmed a social media post by the player's agency that the winger was isolating after testing positive for Covid-19.
"Well, I think we have done well to follow the protocols as we have," he said. "We've had the odd case and Facundo Pellistri got a positive.
"He reported that on his Twitter site. We don't normally comment on who they are but Facundo is well and hopefully he'll be back with us soon.
"He's been with the reserves and (under-) 23s and he wasn't in our group over Christmas. But apart from that, we have a full and fit squad."