Bhopal, July 03 (ANI): Leaders of Congress party protested outside state assembly in Madhya Pradesh on Thursday demanding central police probe into Vyapam scam involving many government employees who got selected through unfair means. Congress party protesters walked out of the state assembly in Bhopal and demanded resignation of Madhya Pradesh chief minister, Shivraj Singh Chouhan, over his alleged involvement in the Madhya Pradesh Professional Examination Board (MPPEB) scam. Congress leader, Ramnivas Rawat, said central police probe is the need of the hour to ensure justice to the students. Vyapam scam, also known as Employment scam, relates to admissions in medical and engineering colleges during the period 2008 to 2010 in which many government employees are under the scanner for getting selected through unfair means.