MEXICO CITY (AP) — A civic organization released a database on Thursday that it says contains official information on more than 20,000 people who disappeared in Mexico over the past six years, a period that also saw thousands of people killed after the government launched a crackdown against drug cartels.

Propuesta Civica, or Civic Proposal, said the database it posted on its website contains details on 20,851 missing people that it says were collected by the federal Attorney General’s Office during the just-ended administration of President Felipe Calderon.