Referee Michael Oliver was surrounded by City players after he awarded Liverpool a spot kick following a Gael Clichy foul on Roberto Firmino.
Former City player James Milner scored from the spot after Clichy, who had raised his boot on Firmino, and David Silva were booked. Some City players continued to remonstrate afterwards.
The hosts equalised 18 minutes later through Sergio Aguero.
Read the full article on eurosport.co.uk: Man City charged by FA over player conduct against Liverpool