Topeka ? A weekend rally in Topeka is being held for the unarmed black teenager shot to death in an Orlando, Fla., suburb.

Sonny Scroggins, a community activist, told The Topeka Capital-Journal that the rally is scheduled for Saturday at 7 p.m. on the south side of the Statehouse.

Trayvon Martin was shot to death last month in Sanford, Fla. A neighborhood watch volunteer has said he shot Martin on Feb. 26 in self-defense. No arrests have been made.

The Justice Department and FBI have opened a civil rights investigation, and the local prosecutor before he quit the case convened a grand jury April 10 to determine whether to charge the man who shot Martin.

Civil rights groups have held rallies elsewhere, saying the shooting was unjustified.