Paramedics were called to the prime minister’s residence at 24 Sussex Dr. early Sunday morning for a female patient “who may have been unconscious,” Ottawa EMS sources have confirmed to CTV News.

“We are aware of the Ottawa EMS attending the residence,” RCMP spokeswoman Cpl. Lucy Shorey said in a statement to CTV News.

“This was a medical call and not a police matter,” she added.

The Ottawa Paramedic Service can’t provide additional information on the incident due to patient confidentiality.

But students at the school where Prime Minister Stephen Harper’s son Ben attends say a group was celebrating Ben’s 18th birthday in Gatineau, Que. before returning to 24 Sussex.

Students and media reports suggest that the teen patient suffered severe intoxication.

Shorey said that the RCMP’s role is to ensure the personal protection of the prime minister and his family and that they are responsible for security at their official residence. The RCMP added that the call did not involve a member of the prime minister’s family.

The Prime Minister’s Office said it has “nothing to add to the story” and refused to confirm whether there was a birthday party or where Harper and his wife, Laureen, were at that time.