"(3A) If, in any case triable by a Magistrate, the trial of a person accused of any non bailable offence is not concluded within a period of sixty days from the first date fixed 742 for taking evidence in the case, such person shall, if he is in custody during the whole of the said period, be released on bail to the satisfaction of the Magistrate, unless for reasons to be recorded in writing, the Magistrate otherwise directs. "(4) If, at any time, after the conclusion of the trial of a person accused of a non bailable offence and before judgment is delivered the Court is of opinion that there are reasonable grounds for believing that the accused is not guilty of any such offence, it shall release the accused, if he is in custody, on the execution by him of a bond without sureties for his appearance to hear judgment delivered. "(5) A High Court or Court of Sessions and, in the case of a person released by itself any other Court may cause any person who has been released under this section to be arrested and may commit him to custody.