WASHINGTON (AP) — At least six child welfare workers will be fired for failing to properly address complaints about a woman's care for her four daughters, who were later found dead in their home, the mayor said Monday.

The decomposing bodies of the girls — ages 5 to 16 — were found Wednesday when deputy U.S. marshals served an eviction notice at the row house. Their mother has been charged with murder.

A social worker at the school where the oldest girl was a student tried twice in April to get city agencies to investigate.

The six employees being fired work for the District of Columbia's Child and Family Services Agency and include a division director.