Just listen for a loud boom.

Via ABC News:

Police in Sochi have launched an urgent search for a possible female suicide bomber who may have already made it past the ring of security set up for the Olympic Games.

Hotel employees in Sochi told ABC News that posters with pictures and descriptions of a 22-year-old woman from nearby Dagestan were distributed over the weekend by authorities and a similar flyer was also seen posted at Sochi’s airport.

The woman is identified as Ruzanna Ibragimova, using the nickname Salima, the widow of a militant reportedly killed in a shoot-out with police last year in Dagestan.

She is described as being affiliated with the Caucasus Emirate, the terror group led by Doku Umarov that has threatened attacks against the Winter Games in Sochi.

Ibragimova is described as having a 10 centimeter scar across the left cheek, a pronounced limp, and a stiff left arm that doesn’t bend at the elbow.

Update: Russia will be lucky if they get through the games unscathed.

(NYDN) — Russian authorities are looking for as many four women who could be used in terrorist attacks during the Winter Olympic games — including one suspect who may have already slipped through the ring of security in Sochi.

Ruzanna (Salima) Ibragimova, 22 — the widow of an Islamic militant killed during a gun battle with police last year — has been missing from her Dagestan home since last month, ABC News reported.

Ibragimova is one of as many as four “black widows” — the term given to the wives of dead terrorists — who being sought by security officials, NBC News reported.

The women are often recruited as suicide bombers by terror cells for their ability to get past security check points because they do not fit the typical profile of an Islamic militant.