SM Entertainment recently confirmed f(x)'s comeback.

"It is true that f(x) are working on their new album," said a representative for the group's record label, SM Entertainment, in a media interview on Thursday. "But the date has not been set yet." 

News of the new album comes roughly a week after member Sulli (Choi Jin Ri) announced on August 7 that she was leaving the pop group in order to focus on her acting career.

f(x) plans to continue promotions as a four-member group with Victoria, Amber, Luna, and Krystal. The group's last release was "Red Light" in July 2014.