02/04/2014 08:46 EST | Updated 04/06/2014 05:59 EDT

Senate expenses: Mac Harb, Patrick Brazeau to be charged by RCMP

Retired senator Mac Harb and suspended Senator Patrick Brazeau will be formally charged today by the RCMP for their alleged roles in the Senate expenses scandal, CBC News had learned.

Those charges are expected Tuesday morning and will be formally announced by the Mounties.

The RCMP are expected to lay fraud charges. 

Both Harb and Brazeau were alleged in court documents to have defrauded taxpayers by claiming travel and living expenses to which they were not entitled.

Brazeau was suspended from the Senate in October along with onetime fellow Conservative Senators Mike Duffy and Pamela Wallin. The three former Conservatives were suspended without pay following an outside audit of their expenses.

Harb, who was a Liberal senator until his spending came under scrutiny through an external audit,​ retired in August after paying back $231,000.