The Quincy City Council will go into executive session Monday night to receive an update on contract negotiations with Quincy police officers and patrol officers.

Quincy Police Chief Rob Copley confirmed Friday afternoon that the police contracts will be discussed but would not provide any further details until aldermen are briefed.

Police officers and supervisors represented by the Police Benevolent and Protective Association Local 12 have been working without a contract since April 30, 2011. The previous one-year deal included no general pay increases. The city and the union are scheduled to go to arbitration in March.

This will be the second time the city has gone to arbitration since union contracts expired April 30, 2011. In November, an arbitrator ruled that Quincy firefighters with Firefighters Local 63 should receive raises of 2 percent this year, 2.5 percent next year and 3 percent in the final year of a three-year contract.

The city was able to reach an agreement with the city’s two other bargaining units — Machinists Local 822 and the Amalgamated Transit Union Local 1108 — earlier in 2011.

The Machinists union represents employees at Central Services, the water treatment plant, the wastewater treatment plan and Quincy Regional Airport, as well as animal control officers and clerical workers at the Police Department. The three-year deal provides a 38-cent raise in hourly pay each year. Transit drivers will get a 2 percent raise in the first and second years of the contract and a 2.25 percent raise in the third year. Non-union city employees received a 1.5 percent raise this year.