Queensland's powerful corruption watchdog has denied the State Government's claim that its staff visit children being held in adult maximum-security watch houses.

Key points: The Qld Police Minister said young offenders in watch houses received regular visits from independent agencies including the CCC

The Qld Police Minister said young offenders in watch houses received regular visits from independent agencies including the CCC However the corruption watchdog says it does not have a program where it visits individuals in watch houses

However the corruption watchdog says it does not have a program where it visits individuals in watch houses The Premier promised an investigation after Four Corners revealed serious incidents involving children in watch houses

The Palaszczuk Government has been under pressure to call a royal commission after the ABC's Four Corners last month revealed serious incidents involving children in watch houses, including a boy being kept in isolation for 23 days and a girl mistakenly being put in with alleged male sex offenders.

In an answer to a question on notice in Parliament from last month, Police Minister Mark Ryan said he had "been assured that young offenders in watch houses receive regular visits from independent agencies, including the Crime and Corruption Commission (CCC) and the Public Guardian".

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But the corruption watchdog has told the ABC it "does not have a general program of work where it visits individuals in watch houses".

The CCC acknowledged it received complaints about how people were treated in watch houses "and these are managed on a case-by-case basis".

After the ABC broke the story this morning, Police Minister Mark Ryan apologised and promised to correct the parliamentary record for falsely claiming the CCC regularly visits children in watch houses.

"There was a misinterpretation between my office and the commissioner's office, I'll be correcting the record," the Minister said.

"It was a mistake and I apologise."

The day after the Four Corners watch house story aired last month, Premier Annastacia Palaszczuk told Parliament that all new matters raised by the program would be "fully investigated".

But Opposition Leader Deb Frecklington last week told the ABC the Premier "had misled the Parliament" over the Government's investigation because only one matter had been referred to the police.

Officials denied a boy was left naked, saying he chose to wear a suicide smock as a sarong. ( ABC News: David Sciasci )

Last week, the ABC revealed an Indigenous boy with an intellectual impairment had been stripped naked inside the Brisbane City Watch House after being deemed a suicide risk.

An officer from the child safety department raised his case, writing to the Public Guardian to say the boy had been left "completely naked" for days with just a blanket to cover himself after refusing to put on a so-called "suicide smock".

After initially telling the ABC it was not aware of the incident, the Queensland Police Service later issued a statement after the story broke to deny the child had been left naked.

It said the boy had chosen to wear the suicide smock "as a sarong for a period of time instead of in the traditional way".