The State's competition watchdog is challenging a High Court ruling preventing it from using documents siezed during a dawn raid on building materials giant, CRH.

Last year the Competition and Consumer Protection Commission siezed documents from CRH's Irish Cement plant in Drogheda as part of an investigation.

However, last month the High Court said that it could not review e-mails taken from the account of Irish Cement director, Seamus Lynch, as these should not have been siezed as their content was unrelated to the business.

The commission said on Friday that it has lodged an appeal against the decision against the judgment prohibiting it from accessing or reviewing certain documents that it siezed during the search in May 2015.

“Notwithstanding the High Court’s judgment, the CCPC’s investigation into alleged anti-competitive practices by Irish Cement in the supply of bagged cement continues,” the commission added.