Two Russians have been detained in Malaysia over a street action involving swinging their baby by the legs and throwing it into the air.
The couple are questioned about alleged abuse of the four-month-old girl the police told the press release AFP.
A video of one of their performances has become viral in recent days, causing police to act.
The parents travel at the end of the 20s across Southeast Asia as busers.
The 90-second video was uploaded on Facebook by a user who described it as an "irresponsible act that can literally cause harm" to urge the police to arrest them.
The clip shows a man holding a baby at his feet, swinging it between his legs and raising it over his head.
He also throws the baby in the air several times, briefly letting go.
Next to him, a group of other Europeans plays instruments and chanting. The Facebook post has been seen more than 28,000 times.
Facebook said it had not taken it down because "it can help save that child".
The video can still be seen online, but with a warning that it "may show violence against a child or a teenager".
Police detained the couple during another performance on a street in Kuala Lumpur.
"We detained them Monday to question the alleged abuse of their four-month-old baby girl," said Kuala Lumpur Mazlan Lazim police chief of the AFP press release.
He told local journalists that the child was scary no sign of harm.
Most comments on the Facebook thread express shocks to the treatment of the child and that the parents use their child to make money.
One comment says that similar baby gymnastics is legal in Russia and not uncommon there.
While controversial also in Russia, some believe that the exercise helps the child develop faster.
Other comments also express their anger that the couple seems to be traveling around Southeast Asia and begging for money.
There has been an increasing trend of Westerners traveling in poorer Asian countries, begging for money and other support to sustain their journey.
Often referred to as "tulips", they are increasingly a source of confusion or anger for local populations.