Montenegro votes today in an independence referendum which could dissolve its union with Serbia.
Even before voting began, some pro-independence supporters set off fireworks and roared around the capital Podgorica last night with their car horns blaring.
If the vote goes there way it will make the small Adriatic republic Europe’s newest state.
However the pro-union camp says Montenegro is too small to survive alone without the jobs, education and health care its larger neighbour has to offer.
Observers from the Organisation for Security and Cooperation in Europe will monitor the vote with the result not expected to be declared before Monday morning at the earliest.