The Ontario Securities Commission has launched a probe of Research In Motion Ltd.’s stock option practices.

The review was launched in early October, which is not long after RIM revealed it would have to restate past financial results because of its options accounting practices.

RIM revealed October 28 that the U.S. Securities and Exchange Commission had launched an inquiry into the way the company granted stock options.

RIM did not disclose information about any similar OSC probe.

The OSC probe came to light this week after Bloomberg News reported that OSC senior legal counsel David Surat mentioned the investigation during a commission hearing on Tuesday. The hearing was held to approve a continuance of an unresolved stock trading ban imposed on RIM officers and directors.

The ban was imposed because the company is in default for filing its second-quarter financial results, which have been delayed pending completion of the internal accounting probe.