( CNN ) -- Anger is growing in Mexico over a fire at a government-run day care center that claimed its 46th child this weekend . Maria Jesus Coronado Padilla mourns for her 2-year-old daughter , who died in the Hermosillo fire . Parents of the dead children and their supporters have held two noisy rallies in Hermosillo , the city in northwestern Mexico where the fire broke out June 5 . They blame the government for laxity in enforcing safety regulations , for conducting a weak investigation and for failing to punish anyone in the 10 days since the fatal blaze . `` It is my fault for trusting them , '' parent Roberto Zavala said at a rally Saturday in front of the Sonora governor 's office . `` I am responsible for the death of my child . Mr . Governor : Here is one of those responsible you are looking for . Come get me . I am waiting for you . '' The rally was televised nationwide by CNN affiliate TV Azteca . `` If there is no justice from the authorities , there will be vengeance from the people , '' Zavala shouted to great cheers . The crowd chanted `` renuncia , renuncia '' ( `` resign , resign '' ) toward the office of Sonora Gov . Eduardo Bours Castelo . He did not appear at the rally . Bours told CNN on Monday that he understands parents ' anguish but has not heard any calls for his resignation . `` What we are seeing is natural , '' he said . `` There are destroyed families . It 's natural that people express their sadness and , in some cases , anger . And there are those who are using this for political purposes . '' The investigation , he said , is `` complex and advancing . '' Mexican President Felipe Calderon has promised a full investigation . Officials have said an air-conditioning unit in a government-run warehouse in the same building as the ABC day care center caused the fire . The privately owned day care was leased by the government to provide low-cost service to parents . Many prominent Mexicans have joined the parents in saying the government is not doing enough to find out what happened and to punish the responsible parties . `` There are 46 children , and nothing is happening , '' said radio and TV commentator Eduardo J. Ruiz-Healy . `` Nobody is responsible . Federal authorities say nothing major happened . There are 46 dead children , and no one will go to jail for it . '' Ana Maria Salazar , another TV and radio commentator , also has voiced her anger -- in newspaper columns , on Facebook and on her blogs . Salazar , who lives in Mexico City , grew up in Sonora state and traveled to Hermosillo last week . `` I just returned from Hermosillo , Sonora , '' she wrote Wednesday on her blog . `` Sorrow for the death of the [ then ] 44 children is now transforming into outrage . The death of these children has impacted Hermosillo , the state of Sonora and Mexico . '' She 's still angry , she told CNN on Monday . `` My concern is that there are 46 children who died in what appears to be negligence and that nobody 's going to be punished , '' Salazar said . In addition , she said , the government has not conducted any investigations to see if other day care centers are safe . `` What is unacceptable , '' Salazar said , `` is that nothing has been done to make sure this does n't happen again . '' The United Nations Children 's Fund 's representative in Mexico , Susana Sottoli , said all day care centers in the nation should be investigated , the state-run Notimex news agency reported Monday . Last week , Mexican Attorney General Eduardo Medina Mora said officials had found safety irregularities at the ABC day care center in 2005 . He declined to detail those irregularities but said authorities are investigating if anything was done about them . ABC day care officials denied Monday ever being told of safety problems . Critics point to cozy business relationships between the owners of the ABC day care and government officials . News reports have said one of the co-owners is a cousin of Calderon 's wife . Two state government officials whose wives also are ABC co-owners resigned last week . In all , six officials have resigned or been fired since the blaze . The well-regarded El Universal newspaper published a column and a story Monday taking the government to task . The article says a Universal investigation revealed that family members and political allies of the governor own at least 13 day care centers in Sonora state . The ABC day care is not one of them . Bours , who was elected governor in 2003 , called the article `` malintentioned . '' `` Some of my relatives had those [ day care centers ] since before I was governor , '' he said . `` This is a low blow by people who want to link one thing with another . '' But Ruiz-Healy calls the day care industry in Mexico `` a business run by politicians and politicians ' wives . '' And he rails at what he sees as arrogance by government officials , whose actions , he said , have led to `` a total crisis of credibility . '' `` There have been a series of events that insult our intelligence , '' Ruiz-Healy said . `` The political class is divorced from reality and from the rest of the country . ''
Parents , their supporters have rallied in Hermosillo , where fire broke out July 5 . They say they did n't follow safety rules , is conducting weak investigation . Sonora governor says investigation is ` ` complex and ' '' UN representative says all day ##care centers in Mexico should be closed .