Police raided a public housing complex Wednesday in a sweep targeting suspected dealers of deadly fentanyl-laced heroin, authorities said according to AP. Officers were looking for 37 suspects and had arrested about half by Wednesday afternoon, said Chicago police spokeswoman Monique Bond. The arrests at the Harold Ickes public housing complex followed a federal bust in June at another housing complex nearby, Bond said. Federal drug agents were not involved in Wednesday's raid, she said. Hundreds of people have died nationwide from heroin laced with the prescription painkiller fentanyl. In Cook County, more than 200 deaths were attributed to fentanyl-laced heroin from April 2005 through August 2006, said Joanna Zoltay, a spokeswoman for the Drug Enforcement Administration in Chicago.