Trainer Jarrod McLean and two registered stable employees have been directed to attend Racing Victoria stewards' inquiries in relation to charges issued by the Victoria Police Sporting Integrity Intelligence Unit.

The police charges emanate from the unit's ongoing investigation after raids on properties owned by Darren Weir in Ballarat and Warrnambool on January 30.

McLean, along with registered stable employee Tyson Kermond and licensed rider agent and registered stable employee William Hernan, have been told to attend the inquiries at RV from 2pm on Thursday.

McLean, Kermond and disqualified trainer Darren Weir were all charged by police on a number offences on Wednesday.

Hernan is facing one charge.

RV chief executive Giles Thompson said the core responsibility of RV was to protect the integrity of the sport and to enforce the Australian Rules of Racing.

"These are serious charges and the nature of the alleged conduct described within the charges is distressing to all within the racing industry, as well as the general community," Thompson said in a statement.

"Upon the issuing of charges today, our stewards have immediately opened inquiries and ordered three persons to attend tomorrow afternoon to answer questions in relation to the charges.

"Those inquiries will dictate our next steps."

Weir will be directed to attend a stewards' inquiry at a future date.