The NFL has decided that teams must hold training camps this summer at their main practice facilities because of the coronavirus pandemic, sources told ESPN on Tuesday.

The NFL plans to announce that plan, along with a tentative start to camps in late July. A source told ESPN's Adam Schefter that the NFL and NFL Players Association decided to keep teams at home because they wanted to limit travel and the risk associated with maintaining two facilities.

There are nine teams that still hold training camps at different sites.

The Carolina Panthers have prepared for every season since their first in 1995 at Wofford College in Spartanburg, South Carolina. WSPA-TV in Spartanburg, citing sources, first reported the development.

The Dallas Cowboys and Pittsburgh Steelers are scheduled for the Hall of Fame Game in Canton, Ohio, on Aug. 6, and would be the first two teams to report in late July. Pittsburgh usually trains in nearby Latrobe, Pennsylvania.

The Cowboys held training camp in Oxnard, California, from 2012 to 2019, and had been in discussions with the city as well as the River Ridge Residence Inn, their camp home, about pushing back their dates this summer as well as securing the site for camps in the future.

With camp at The Star, the Texas heat could be an issue and lead the team to have practices earlier in the morning or in the early evening. The Cowboys have held early-evening camp practices at The Star that have been open to fans since the facility opened in 2016 after a stay in California of nearly a month.

Another potential issue for the Cowboys is that The Star has just one grass practice field. In addition to the cool temperatures in Oxnard, the team had the use of two grass fields to help ease the burden on players' legs.

The Washington Redskins, Buffalo Bills, Kansas City Chiefs, Indianapolis Colts and Los Angeles Rams also normally leave their main facilities. The Chicago Bears spent the past 18 years training at Olivet Nazarene University in Bourbonnais, Illinois, but had announced earlier this offseason that they would move camp back to Halas Hall in Lake Forest. (The Green Bay Packers practice at their team facility, but technically stay at St. Norbert College in nearby De Pere, Wisconsin.)

One team is somewhat in limbo: the Raiders. Their move to Las Vegas has been complicated by the pandemic, of course. They had been working out of their Oakland-area complex in Alameda, and had been planning to hold training camp as usual in Napa, about one hour north of the Bay Area. But they could decide to move it to their new facility in Henderson, Nevada.

The league announced in mid-May that teams could begin reopening their facilities on a limited basis when state and local governments allowed it.

The next phase of reopening began Monday with clubs allowed to reopen ticket offices, retail shops and other customer-facing facilities, as long as the openings fully comply with state and local regulations.

Currently, no coaches are allowed in team facilities, although that could change in the near future.

Information from ESPN's Todd Archer and The Associated Press was used in this report.