The authorities said that the men were taken into custody for unauthorized entrance while on the Sampan.
The Singapore Civil Defence Force (SCDF) said two people were sent to Khoo Teck Puat Hospital.
The SCDF said that 13 people were taken to Ng Teng Fong General Hospital, while nine were transported the National University Hospital.
According to a press release from the Corrupt Practices Investigation Bureau (CPIB), smoking was not permitted in the area.
The man was arrested for voluntarily causing hurt by grievous means and for voluntarily causing hurt to deter a public servant from performing his duty.
The Ministry of Manpower said that T.A.G. Construction is the employer of the injured worker and that general contractor HLBC is the occupier overseeing the operation.
The SCDF said that one person was evaluated for minor wounds but refused to be admitted to the hospital.
The police officer was the final of three people convicted of mistreating Piang Ngaih Don, a Myanmar maid who died in 2016 at the weight of just 24 kg.
The authorities do not believe that foul play is involved based on preliminary investigations.
Capital punishment in Singapore is imposed only for serious crimes, such as the trafficking of significant quantities of drugs which cause serious harm.
SFA said in a statement that they are following up with further investigations and will not hesitate to take enforcement action.
According to reports, the man has also entered a guilty plea to distinct allegations of sexual harassment and violence.
According to the prosecutor, the boy "also left behind a note for the shop owner, apologising for stealing the toy car".
A forensic study revealed that DNA was found in "low quantity" and "no traces of semen were detected" in any of the samples.
According to Singapore law, an offender faces a maximum sentence of seven years in prison and a fine for each stealing offense.