"V C Shukla continues to be serious and still not out of danger," said a spokesperson of city-based Medanta Hospital, where the former Madhya Pradesh chief minister is undergoing treatment.
Though Shukla had shown marginal improvement a week back but his condition again decorated following an infection and he still remains critical, he said.
The 84-year-old former union minister had sustained three bullet wounds after he was caught in the middle of an ambush by Maoists on a Congress convoy in Chhattisgarh's Bastar district on May 25.
Heavily-armed Maoists had ambushed a convoy of Congress leaders in Bastar district, killing 27 people including PCC chief Nand Kumar Patel, his son Dinesh, Congress leader Mahendra Karma and ex-MLA Uday Mudliyar and injuring 31 others.