Operatives of the Economic and Financial Crimes Commission (EFCC) have surrounded the Abuja residence of a former governor of Imo State, Rochas Okorocha.
Our correspondent, who is currently at the residence, also observed the presence of armed personnel of the Nigeria Police Force.
A source at the anti-graft agency said on Tuesday Okorocha has been snubbing several invitations extended to him over alleged corruption against him.
The spokesman for the EFCC, Wilson Uwujaren, has yet to respond to several phone calls by our correspondent.
In January, the anti-graft agency had charged the senator with allegations he conspired with others to steal N2.9 billion from public coffers.
EFCC filed the charges at the Federal High Court, Abuja.
In addition to Mr Okorocha, other defendants are Anyim Nyerere Chinenye, Naphtali International Limited, Perfect Finish Multi Projects Limited, Consolid Projects Consulting Limited, Pramif International Limited, and Legend World Concepts Limited.
The charges were filed about the same time Okorocha declared his intention to run for the office of the president in 2023.