The Canadian military has relocated some staff at its East Coast intelligence centre following the arrest of a junior naval officer accused of spying for Russia.

The shuffle involves intelligence staff at the highly-secure Trinity establishment at Canadian Forces Base Stadacona in Halifax. They are now posted at the nearby Shearwater air base in Dartmouth.

A senior military source has told Â鶹´«Ã½ the Trinity building is now being swept for surveillance bugs and computer viruses.

"As part of a normal and prudent business contingency plan, personnel belonging to elements of HMCS Trinity have been relocated to 12 Wing Shearwater for an undetermined time period as a security precaution," the Defence Department said in a statement.

Sub.-Lt. Jeffrey Delisle, 40, charged last week with leaking information to a "foreign entity" and breach of trust, was posted to Trinity last August.

Sources have told Â鶹´«Ã½ that Delisle allegedly leaked information to Russia. He is also charged under the Criminal Code with a breach of trust by a public officer.

Lawyer Cameron MacKeen told a brief court proceeding Monday that he could no longer represent Delisle. He didn't offer a reason for withdrawing from the case.

Delisle's next court appearance has been scheduled for Feb. 28, when a date for a bail hearing will be set.

--With files from The Canadian Press