PORTLAND — FBI agents in Oregon have arrested a Portland city worker on allegations that he provided support to a suicide bomber who participated in a 2009 attack in Pakistan that killed about 30 people and injured another 300.

U.S. Attorney Amanda Marshall says 48-year-old Reaz Qadir Khan was arrested Tuesday morning at his home and charged with one count of conspiracy to provide material support to terrorists. He pleaded not guilty in federal court. A detention hearing has been scheduled for today.

The indictment says Khan provided advice and financial help to Ali Jaleel, one of three people who carried out the suicide attack at Pakistan's intelligence headquarters in Lahore.

If convicted, Khan faces a potential sentence of life in prison.

Khan is a wastewater treatment plant operator for the city of Portland. In a statement, Mayor Charlie Hales urged people to remember that Khan is presumed innocent unless proven otherwise.