An investigation into accusations of voyeurism aboard HMCS Montréal last fall has ended with no charges laid.

A female sailor accused a male crew member of sneaking into the women-only quarters and trying to photograph or take video of her as she lay on her bunk.

Last month, the Canadian Forces National Investigation Service finished its investigation, spokesperson Capt. Joanna Labonte said in an email to CBC News.

Investigators "determined that there was insufficient evidence to lay a charge in this matter," she said.

Military police investigators had seized a cellphone believed to have been used in the November 15 incident, according to court documents obtained by CBC.

The sailor said she was lying in her bunk playing solitaire when an arm holding a phone reached through the privacy curtains, according to an affidavit sworn by a military investigator to obtain a search warrant for the phone.

Military police declined Thursday to reveal what was found on the cellphone.

Patrol frigates have an average crew size of roughly 225. (Department of National Defence/Canadian Armed Forces)

The male sailor was flown off the ship to separate him from the alleged victim, Rear Admiral John Newton, commander of Maritime Forces Atlantic, said in December.

The Montréal was near Mayport, Fla., almost finished a deployment.

The incident was reported to the investigation service, which deals with serious and sensitive matters, by a third party four days after it was said to have happened.

No one from Maritime Forces Atlantic was available Thursday to answer questions.

Military police take allegations seriously, Labonte said in her email. "In all cases, investigations are conducted to determine the facts, analyze the evidence and, if warranted, lay appropriate charges," she said.

The Canadian Forces was praised last year for swiftly investigating the allegation, only months after a former Supreme Court justice called military sexual misconduct "endemic".

This allegation of voyeurism came as an allegation of sexual assault on board another navy vessel also was under investigation.