Police are searching for three people they say stole an R subway train. The theft was discovered at around 10 p.m. Saturday, the NYPD said.The brazen thieves posted their joyride on social media, authorities said.

The suspects stole the R train from a layup track while it wasn’t in use, getting inside the car with transit keys Sunday evening, sources told The Post.

The thrill seekers, all clad in black and wearing masks, are seen on video at the controls of a train traveling upwards of 30 mph before they returned the pilfered train to near where they swiped

The train was left secured on a layup track at the 71st Street station in Queens, but at around 10:20 p.m. last Saturday, some thieves had an idea of their own: a joyride.