The fourth kind of daṇḍasamādāna (killing)/ kriyāsthāna:
accidental killing of some other person while killing someone else.
ahāvare cautthe daṃḍasamādāṇe akasmādaṃḍavattie tti āhijjai-se jahāṇamae kei purise
kacchaṃsi vā dalaṃsi vā...kaviṃjalaṃ vā viṃdhittā bhavati-iti khalu se aṇṇassa atthāe aṇṇaṃ phusai-akasmādaṃḍe.
(Sūtra 2.2.6)