A day after resigning from the Punjab assembly, former Shiromani Akali Dal leader Inderbir Singh Bolaria joined the Congress on Tuesday.Bolaria, who represented the Amritsar-South assembly seat since 2008, had sent his resignation to Assembly Speaker Charanjit Singh Atwal on Monday.He joined the Congress in the presence of state Congress president Amarinder Singh at an event in Amritsar, 250 km from here.Bolaria, who was first elected in 2008 (by-election) from the Amritsar South seat, was re-elected in the 2012 assembly polls. He was made Chief Parliamentary secretary (CPS) in the Punjab government earlier. He was suspended from the Akali Dal recently after he rebelled against a decision of the Punjab government to set up a waste management plant in his constituency.