Two friends were slashed after a night of partying in the Clarke Quay area on Tuesday.
One ended up with a 4cm-deep knife wound to his neck and the other was slashed on her left arm.
The pair said they had just left a club at 5.45am on Tuesday and they noticed a group of men in a scuffle.
Then one of the men broke free and started running towards the male victim.
He said: “As my friend and I walked by, the man who was being beaten up suddenly came at us with something like a knife.”