More than 70 people were injured and 30 people remain hospitalised, with 15 of them in intensive care units, according to the Erawan emergency services centre in Thailand's capital.

The blaze at the Rong Beer Na Ladprao bar was the city's deadliest in 17 years. It broke out late Sunday in a northern part of the city, and firefighters needed half an hour to bring it under control.

An investigation into the cause of the fire and whether the bar was following safety regulations is ongoing.

Survivors and relatives of the deceased visited a police station near the scene on Wednesday to seek compensation, gather belongings and share statements about the blaze.