Turnstile “fins” may be coming to a subway station near you as part of the MTA’s push to stop fare evaders. The vertical, metal “fins,” as they’re called, have ridges on the top that are meant to deter fare evaders from jumping over the turnstile.

The NYPD is asking for your help identifying a man it says set off a string of small fires in Lower Manhattan and Queens, including one aboard a subway train.

Police are looking for a suspected serial arsonist accused of setting at least four fires within hours of each other last week. In the first incident, police say the suspect intentionally started a fire that damaged a parked NYPD car in front of City Hall around 2:20 a.