"Data at 9 a.m. local time indicated that some 200 people were moved to five hospitals in Jakarta, while six others had died," Jakarta Governor Anies Baswedan remarked at the City Hall here on Wednesday.
Investigation and post-mortem will be conducted to ascertain the causes of deaths, he noted.
The governor appealed to the people to not panic or become provoked.
"Maintain order and security. All need peace. I request all on the field to maintain (composure) and remain calm in expressing your views," Baswedan emphasized.
The Jakarta administration will pay for the medical bills of the victims.