The Delhi High Court said on Friday that before granting further extension to a probe agency to complete the investigation in a case lodged under the anti-terror law, a special court has to apply its mind to ascertain the reasonable time required and extend the period of custody of accused for a period up to 90 days. The high court said the report of the public prosecutor is not required to be provided to the accused at the stage of granting of an extension of remand for continued investigation.