By ALLISON PECORIN and TRISH TURNER, ABC News

(WASHINGTON) — In a surprise move, a top Senate Republican, Missouri Sen. Roy Blunt, announced Monday that he will not run for reelection in 2022.

Blunt has served in the Senate since 2011 and in the House of Representatives previously.

He’s currently the No. 4 Republican in the Senate.

Blunt announced his plans in a two-minute video released Monday morning.

“After 14 General Election victories — three to county office, seven to the United States House of Representatives, and four statewide elections — I won’t be a candidate for reelection to the United States Senate next year,” Blunt said in the video.

He didn’t explicitly explain why he’s chosen not to run again.

Blunt joins a growing list of veteran Republican incumbents who have announced they will not return the Senate in 2022. He joins Sens. Richard Shelby, R-Ala., Rob Portman, R-Ohio, Pat Toomey, R-Pa., and Richard Burr, R-NC. who have all said they will not seek to keep their seats.

This is a developing story. Please check back for updates.

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