A man who flew a drone into a football stadium in Serbia during a Euro 2016 qualifier last October has been arrested ahead of the return leg in Albania.
Ismail Morinaj was detained after giving an interview in which he admitted carrying a gun for protection.
Last year's match had to be abandoned as Serbian fans invaded the pitch and attacked Albanian players.
Security for the Serbia team is high in Albania before Thursday's match.
Although the match will take place in Elbasan, an hour's drive to the south-east of Tirana, the Serbia team are staying at a hotel in the capital surrounded by police.
Reports from Tirana spoke of roads inside the city being closed amid a major police operation.
Albania are third in their Euro 2016 qualifying group, behind Portugal and Denmark, but far ahead of Serbia and still hoping to qualify for the knock-out stages of the competition.
Police arrested the 33-year-old suspect and three other men, saying they had found a Zastava pistol and several cartridges, as well as 36 tickets for Thursday's match.
Tensions had already been high before the Euro 2016 tie at the Partizan Stadium in Belgrade and ordinary Albanian fans were not allowed to attend the match.
The two countries have had a long and bitter history of rivalry, and ethnic-Albanian-majority Kosovo's decision to declare independence from Serbia in 2008 brought relations to a new low.
Ismail Morinaj admitted flying the drone from a church across the road from the stadium. As it hovered above the pitch, a large "greater Albania" flag could be seen, portraying nationalist claims to neighbouring states.