Two of 13 children granted bail by a Townsville magistrate less than a fortnight ago have been arrested again, a court has heard.  

The decisions to grant bail to 13 alleged young offenders prompted the Queensland Police Service (QPS) to issue a statement that they would be increasing bail checks in the city, and would be seeking legal advice to appeal the decisions.

Lawyers representing the QPS appeared in the Supreme Court in Townsville on Monday to appeal two of the decisions made in the Townsville Children's Court on February 9.

However, before applications to appeal the decisions to grant two children bail were heard, the matters were stood down by Justice David North.

The court heard the two children who were the subject of the applications being made by police had been arrested again.

The two children are expected to have their matters heard in the Townsville Children's Court today.