(CHICAGO) A deputy commissioner of the Chicago Fire Department resigned Wednesday after crashing a city-owned vehicle on Lake Shore Drive.

John McNicholas was involved in the crash off Lake Shore Drive near North Avenue early Wednesday, according to an emailed statement from Chicago Fire Department spokesman Larry Langford.

He was driving a CFD vehicle westbound on LaSalle Drive just off Lake Shore at 12:50 a.m. when another vehicle cut him off, according to Chicago Police.

The CFD vehicle swerved to avoid a collision, went over a curb and struck a utility pole, police said. No one was hurt.

No citations or charges have been issued, but police and fire officials are conducting “a joint open and active investigation,” police said.

McNicholas tendered his resignation to department commissioner Jose A. Santiago Wednesday and is “fully cooperative with the Internal Affairs Division,” according to Langford.