​Linkin Park scraps tour following Chester Bennington's injury

From left, Mike Shinoda, Chester Bennington, and Brad Delson of Linkin Park at Bridgestone Arena on Jan. 17, 2015, in Nashville, Tennessee.

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Linkin Park is canceling the rest of its U.S. tour after its lead singer injured his leg.

Chester Bennington says he needs immediate medical attention and it's impossible for him to perform. Bennington hasn't said how he injured his leg.

Linkin Park's "The Hunting Party" tour kicked off last week. The rock band performed only three concerts.

Bennington appeared onstage with crutches at the band's Sunday concert in Indianapolis.

He said Tuesday he's "disappointed" he can't perform and called the first few shows "magical."

Fans can seek refunds for the remaining 16 shows.

The group was on tour behind last year's album. which is called "The Hunting Party" because it's the "idea of us getting what we want to get," Linkin Park member Joe Hahn told CBS News last fall.

"We were trying to get back to this guttural emotion of making something heavy," Hahn said. "We found ourselves reacting to what's going on in the world. A lot of its pop-driven."

The Grammy Award-winning band's hits include "In the End," "Numb" and "New Divide."