Are sandwich bots illegal?

Could you please clarify if the use of sandwich bots in cryptocurrency trading is considered illegal? I've heard rumors that these bots, which place orders just before and after a larger order to manipulate prices, may violate securities laws or trading regulations. Is there a definitive answer on whether or not these practices are legal, and if so, are there any specific jurisdictions where they are explicitly prohibited? I'm interested in understanding the legal implications of using sandwich bots in the crypto market.