Gronkowski can be heard on a 911 call telling a dispatcher that his home was burglarized while he was at the Super Bowl. Police in Foxborough released a portion of the call on Tuesday.
He can be heard telling the dispatcher on Monday: "This is Rob Gronkowski calling, and while I was gone my whole house got robbed, while on the Super Bowl trip. And I just got back.''
In a recording of the call Monday between responding officers and dispatch, a dispatcher said, "multiple safes and possible guns" were taken.
Foxborough Police Chief William Baker on Tuesday would not say when the robbery happened or what was taken from the house, but he did say Gronkowski was away at Super Bowl LII when the break-in occurred.
"There were items stolen," Baker told reporters Tuesday morning. "We're not going to release the nature of the items stolen.
"Obviously the people who committed the theft know what was stolen. It's an investigative advantage for us to know that as well and not share it with the public, so I won't have any further comment on that."
Gronkowski lives just a few miles from Gillette Stadium, where the Patriots returned late Monday afternoon after Sunday's Super Bowl LII loss to the Philadelphia Eagles in Minneapolis.
Police arrived at the home Monday at about 6 p.m. local time, and both local and state police were on the scene for much of the night, according to reports.
"It's a tough combination to have suffered this unfortunate loss, and then to get home and be a victim of this kind of crime, which really has a profound effect on everybody who is a victim of this crime when your personal space is breached like that," Baker told reporters.
Gronkowski had 9 catches for 116 yards and 2 touchdowns in the Patriots' 41-33 loss to the Eagles.
The Associated Press contributed to this report.