Seven yellow balloons were dropped from upper floors of the Pavillion shopping mall in Bukti Bintang during an event attended by Prime Minister Najib Abdul Razak and his wife Rosmah Mansor.
Najib was on the ground floor at the centre court of the shopping mall to officiate at the Diversecity Kuala Lumpur International Arts Festival.
The seven balloons were decorated with the words "Free media", "Democracy" and "Justice", among others.
Incidentally, yellow is the official colour of the Bersih 4 rally, which, among others, called for Najib's resignation as prime minister for his bad handling of the 1MDB controversy and for receiving a "donation" of RM2.6 billion in his private bank accounts.
Tens of thousands of people took part in the 34-hour rally near Dataran Merdeka over the weekend.
When the balloons were launched, many people in the mall took notice and pointed into the air.
Eventually, the balloons landed behind a stage and were destroyed by security personnel.
Najib dan Rosmah did not react to the incident.
Prior to the incident, Najib and Rosmah were admiring artworks. Neither gave a speech during the event and left an hour later.
It is understood that a performance artist has been arrested in connection with the dropping of the balloons.