A man who worked at a sewage plant in Portland, Oregon, has pleaded guilty to being an accessory after the fact in a suicide bombing that killed about 30 people in Pakistan and injured another 300.

Reaz (RAY'ahz) Khan admitted before U.S. District Court Judge Michael Mosman on Friday that he arranged for suicide bomber Ali Jaleel to receive about $2,450 before Jaleel participated in the May 2009 attack.

Khan also admitted providing advice and financial assistance to Jaleel's wives.

Sentencing is June 8. Prosecutors and defense attorneys have jointly requested a sentence of seven years.

A federal grand jury indicted Khan, now 51, just after Christmas in 2012. He worked for the city as a wastewater treatment plant operator.