Patriots TE Rob Gronkowski has broken arm, CBSSports.com reports

Rob Gronkowski (87) of the New England Patriots beats Kavell Conner (53) of the Indianapolis Colts into the end zone for a touchdown in the first half at Gillette Stadium on November 18, 2012 in Foxboro, Massachusetts. / Photo by Jim Rogash/Getty Images

FOXBOROUGH, Mass. The New England Patriots lost tight end Rob Gronkowski with a broken arm late in Sunday's 59-24 victory over the Indianapolis Colts, CBSSports.com's Jason La Canfora reports.

Gronkowski is having surgery Monday, a source told La Canfora. There is no exact timetable for Gronkowski's return but the injury is not season-ending, La Canfora reports. Initial reports Sunday put the All-Pro's recovery time at 4-6 weeks.

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Gronkowski, 23, had seven catches for 137 yards on Sunday, including touchdowns of 4 and 24 yards in the game. He was reportedly injured while blocking for an extra point on New England's eighth touchdown.

The happy-go-lucky Gronkowski had 10 touchdown catches as a rookie and then set an NFL record for tight ends with 17 touchdowns last year, when he caught 90 passes for 1,327 yards. But he sprained his left ankle in the AFC title game and was a nonfactor in the Super Bowl, which New England lost 21-17 to the New York Giants.

The Patriots had been without Aaron Hernandez, their other first-string tight end, for the last three games — and a total of six this season — after he sprained his right ankle in Week 2. He has just 17 catches for 143 yards and two touchdowns in four games.

Hernandez went from being listed as "out" in the injury report to "questionable" after the Nov. 4 bye week and remained that way for each of the last three games. He had limited participation in practice in each of the last three weeks; the team has not given a timetable for his return.

The Patriots next play on Thanksgiving night against the New York Jets.