Operatives of the anti-graft agency had gathered some evidence on the issues raised in the petition.
It was gathered that the commission would soon send invitation letters to some of the members listed in the petition, including Speaker Dogara.
Abdulmumin had accused the Speaker, Dogara, and other principal officers of the House of padding the 2016 budget to the tune of N40bn as constituency project.
He alleged in the petition that the N40bn projects were shared among Speaker, his Deputy, Yussuff Lasun; the Whip of the House, Alhassan Ado-Doguwa; and the Minority Leader, Leo Ogor.
He also alleged that Dogara ignored his complaint that the chairmen of 10 out of the 96 committees inserted 2,000 projects worth about N284bn into the budget among others.
He had claimed also that his refusal to accept a requested insertion of N30bn into the 2016 budget caused the rift between him and the leadership of the house.
The source, who spoke to The Punch on condition of anonymity, said, “The commission is seriously working on the petition against the Speaker of the House of Representatives, Yakubu Dogara, and some principal officers of the House.
“The investigation is progressing smoothly. As a matter of fact, operatives have interrogated officers of 16 ministries in reaction to the matter.
“We will soon get to the level where those who have cases to answer would be invited.”
The Presidential Advisory Committee Against Corruption also said they had a meeting with Jibrin.
The Executive Secretary of PACAC, Prof, Bolaji Owasanoye, had said during a briefing in Abuja that the committee would give the necessary advice to the government on the issue.
He said, “We have met with Jibrin, which all of you know about; we are following up. I cannot tell you that publicly. We have met with Jibrin; it is not a lie, it was a very useful engagement for five hours, so, that tells you that it was not a tea party."
