Answer-When is a gang rape said to have been committed?

IPC Section 376D. Gang rape Where a woman is raped by one or more persons constituting a group or acting in furtherance of a common intention, each of those persons shall be deemed to have committed the offence of rape and shall be punished with rigorous imprisonment for a term which shall not be less than twenty years, but which may extend to life which shall mean imprisonment for the remainder of that persons natural life, and with fine Provided that such fine shall be just and reasonable to meet the medical expenses and rehabilitation of the victim Provided further that any fine imposed under this section shall be paid to the victim.