Production of the Fiat 500L has been suspended.

Production at Fiat's Serbian production facility has come to a grinding halt after a supplier was unable to deliver vehicle parts. The Serbia plant build Fiat's 500L line of vehicles.

Fiat isn't divulging the root of the problem, but it is likely tied to an unrelated labor dispute. Workers at a transportation company have setup several blockades on railroad tracks and roads in the region over unpaid wages. The protests have been ongoing for over a week.

Fiat says there is no timetable for when the factory might reopen.

"Production ceased on Wednesday and we still don't know when it will resume," Fiat spokeswoman Aleksandra Rankovic told Reuters.

Opened in 2012, the plant - which is 67 percent owned by Fiat and 33 percent by the Serbian state - is a crucial part of Serbia's economy. The plant built 30,000 vehicles last year, but was expected to produce as many as 140,000 cars this year.

Photos by Mark Elias.