As soon as the House met for the day, BJP members shouted slogans "unravel mystery of missing files" on coal block allocation.
Raising placards, they also shouted, "Pradhan Mantri jawab do".
AIADMK MPs also trooped into the Well on the same issue.
TDP members from Seemandhra region kept raising slogans near the Speaker's podium protesting government's decision to bifurcate Andhra Pradesh and form separate Telangana.
"We want united Andhra Pradesh," they shouted.
Congress members from Seemandhra region also raised the issue. Carrying placards supporting the demand for united Andhra Pradesh, they stood in the aisle.