TRENTON - (AP) - The chief of staff to the mayor of NewJersey's capital has been suspended without pay following hisarrest for allegedly attempting to buy heroin in an incident thatleft two police officers injured.

Trenton Mayor Tony Mack announced Monday that Paul Sigmund IVhad been relieved of his duties "indefinitely" following hisarrest by city police earlier in the morning, just blocks from cityhall.

The mayor said Sigmund - who also was charged with two counts ofaggravated assault on a police officer, obstructing theadministration of law, loitering to commit a drug offense andresisting arrest - will seek treatment "through a comprehensiverehabilitation program."

Sigmund was arrested at about 9:10 a.m. in the 200 block of EastHanover Street, shortly after a police officer saw him acting in asuspicious manner in the city's downtown area, Trenton PoliceDirector Joseph Juniak said.

When the officer, Sgt. John Breece, asked Sigmund why he was inthe area, Sigmund walked away. But Breece soon spotted him on EastHanover Street and requested backup.

Breece and Officer Edwin Holmes then tried to question Sigmund,but he would not follow their commands and directions, Juniak said.A struggle ensued. The officers subdued Sigmund and arrested him.Breece injured his right knee in the struggle, while Holmessustained a possible fractured right index finger.

Juniak called the incident "unfortunate" but commended Breeceand Holmes for their "professional performance of their duties."He said Sigmund would receive no preferential treatment and that hewould face the "appropriate consequences" for his actions.

The 46-year-old Sigmund could not be reached for comment onMonday, and it was not known if he had retained a lawyer. He joinedMack's administration in March after state officials urged themayor to hire a chief of staff, but his short tenure in Trenton hasproven to be contentious, including an incident last month in whichhe was stopped by Trenton police after he allegedly was speeding onRoute 1 in a city-owned vehicle.

He was later charged with driving with a suspended license.

Noting that incident and his arrest, City Council PresidentGeorge Muschal said he would call for Sigmund's immediateresignation.

A former Mercer County Freeholder, Sigmund is a member of aprominent political family. His late mother, Barbara Boggs Sigmund,is a former mayor of Princeton and the daughter of former Louisianacongressman Hal Boggs. His aunt is ABC commentator Cokie Roberts.