Police say a couple caught on camera engaging in oral sex on a crowded MBTA station platform will face felony charges and could end up on the state’s sex offender registry.

That is, if they are caught.

“We’re going to exhaust all resources to identify, locate, and arrest these people,’’ said Lt. Richard Sullivan, spokesperson for the Transit Police.

The incident — which took place on May 15 at the Orange Line’s State Street station — came to the attention of authorities after an MBTA passenger posted the photo on a Facebook page.

Soon, people all over Boston were snickering. But it may not be funny to the couple.


Sullivan told Boston.com that – once identified – the perpetrators will be charged with open and gross lewdness, a felony punishable by up to three years in state prison and up to a $300 fine.

Sullivan added that, if found guilty, the case would go before the state’s Sex Offender Registry Board.

“Police are determined to identify and charge this individual or individuals, making it very clear that such absurd conduct will not be tolerated,’’ said MBTA spokesperson Joe Pesaturo.

“The MBTA and Transit Police have always urged customers to report lewd and inappropriate conduct,’’ Pesaturo said. “We are grateful to the person who reported this stunningly uncivilized behavior.’’

Sullivan told Boston.com that “if anyone knows who he is, or they are,’’ to contact the Transit police.

“We are just as disgusted as the general public,’’ Sullivan said, adding that the incident is “not a common occurrence.’’