Parliament's investigations into allegations of corruption in the oil sector have been brought to a screeching halt today after the Constitutional Court issued a temporary injunction stopping the ad-hoc committee from investigating Prime Minister Amama Mbabazi and two other ministers pending the disposal of a petition opposing the probe. The court also allowed the Parliamentary Commission to present an application on Wednesday in which it seeks to join the Attorney General as defendants in the petition that opposes as unconstitutional the bribery probes against Mbabazi, Hillary Onek and Sam Kutesa.