The Titans said in a statement they will "work remotely" on Tuesday "out of an abundance of caution" as they take steps to confirm the positive tests:
The NFL and NFLPA confirmed in a statement that the Titans had three players and five personnel test positive.
According to ESPN's Adam Schefter, defensive tackle DaQuan Jones, long snapper Beau Brinkley and tight end Tommy Hudson were placed on the reserve/COVID-19 list. That said, placement on that list does not guarantee those players tested positive.
Commissioner Roger Goodell issued a memo to teams in the wake of the positive test results, noting that a situation like this was "not unexpected":
Tom Pelissero @TomPelissero
NFL Commissioner Roger Goodell just sent this memo to club executives in light of the #Titans eight new confirmed positive COVID-19 cases, urging clubs to revisit steps taken to limit close contacts and review procedures for bringing in new players, among other precautions. https://t.co/vxkk8Z9Xbh
Meanwhile, the Steelers are proceeding as if Sunday's game would be played.
"We have been in contact with the NFL regarding the positive COVID-19 tests with the Titans," the Steelers said in a statement. "We have been informed to proceed with our game preparations for Sunday's game until we are informed otherwise. We will provide more information when available."
Russini added that an NFL source texted her: "We are shutting Tennessee down until Saturday."
The NFL issued an official statement about the Titans' test results and additional steps that will be taken involving them and the Vikings:
Mark Maske of the Washington Post reported that Tennessee's positive results are confirmed positives, with "no current suspicion of false positives."
Titans head coach Mike Vrabel told reporters on Monday that outside linebackers coach Shane Bowen wasn't with the team for Sunday's 31-30 win over the Vikings after being placed on the NFL's COVID-19 list.
ESPN's Kevin Seifert noted "it remains possible that some or all of these results are false positive" because every positive test is subject to two follow-up tests to determine if the initial result was correct.
The NFL has yet to have a game postponed because of positive coronavirus tests involving a single team.
Atlanta Falcons cornerback A.J. Terrell became the first player put on the reserve/COVID-19 list during the season Saturday, but the team was able to play its game against the Chicago Bears after contact tracing determined there were no other positive results.
The Titans are one of six remaining undefeated teams in the NFL and lead the AFC South with a 3-0 record.