Whenever an act, which is criminal only by reason of its being done with a criminal knowledge or intention, is done by several persons, each of such persons who joins in the act with such knowledge or intention is liable for the act in the same manner as if the act were done by him alone with that knowledge or intention"
32 IPC Words referring to acts include illegal omissions
34 IPC Acts done by several persons in furtherance of common intention
36 IPC Effect caused partly by act and partly by omission
37 IPC Co-operation by doing one of several acts constituting an offence
38 IPC Persons concerned in criminal act may be guilty of different offences