MEXICO CITY -- Relatives of people missing in Mexico say authorities seem more interested in manipulating the data on the disappeared than on conducting thorough investigations.

A group of parents with missing children and representatives of civil organizations on Tuesday criticized the government's new calculation of those who have disappeared.

The Mexican government last week said it believes 22,322 people have gone missing since the start of the country's drug war in 2006. That was significantly higher than earlier estimates. In May, the government had said 8,000 people were missing.

Researcher Ximena Antillon says the government's numbers have been confusing and that authorities have failed to say what methodology they are using to come up with their figures.