Wilson Uwujaren, EFCC spokesman, confirmed the development to TheCable.
“He responded to an invite from the commission this morning,” he said.
Obasa was accused of embezzling public funds and abusing his office.
SaharaReporters had carried out an investigation on the speaker who allegedly owns more than 60 bank accounts.
He was accused of using his office to misappropriate funds and allocate contracts to himself through third party sources, as well as other acquaintances.
The state house of assembly had cleared the speaker of the allegations, saying they are untrue.
Civil society organisations had petitioned the EFCC to carry out comprehensive investigation on the matter.
An unidentified lady, who was said to have acted as personal assistant to the speaker, was also questioned by officials of the anti-graft agency.
“We will give it the required attention. We have our process here. This is the first process. You have submitted. We will go through it. I assure you we will give it the attention it requires. Always do your things within the ambit of the law.” Rabo said.