Romanian subway officials have gotten their knickers in a twist over a planned stunt in which people will ride the Bucharest subway without their pants.

Briefed about plans, the Metrorex subway managers said Friday that those "who disturb public order or are indecent will be fined," and reported to the police.

The No Pants Subway Ride began in 2002 in New York as a stunt and has taken place around the world since then. Organizers call it "an international celebration of silliness" and are organizing it in dozens of cities on Sunday.

Sub-zero temperatures are forecast for Sunday in Bucharest, when participants are expected to turn up at a downtown subway station wearing coats, hats, scarves and gloves — but no pants.