Seven families in the Twin Cities are alleging that school policies in the state result poor and minority students being grouped together in schools, according to Minnesota Public Radio News.

The lawsuit filed on Thursday says the policies have allegedly contributed to the achievement gap in the state, reports MPR.

A similar case was filed about 20 years ago by the NAACP and the new suit will be led by the same attorneys, reports the Star Tribune.

The lawyers said the suit is asking the city to redraw the district boundaries in the state, which would be the part of a state-wide integration plan, according to the Star Tribune.

“I want all the children from the Twin Cities to be able to go to a nice desegregated school and get a better education,” Alejandro Cruz-Guzman, one of the plaintiffs in the case, said to CBS Minnesota.

The complaint says the segregation isn’t limited to just urban schools, but also to districts, suburban schools and charter schools, reports the Star Tribune.

“… The state, the city and suburban school districts working together have decided where children go to school,” attorney John Shulman said to CBS Minnesota.