In 2018 there were no exact official figures on how many firearms are missing; in Serbia authorities have given estimates ranging from 250,000 to 900,000 of different kinds are in circulation. In Bosnia, public reports state a figure of 750,000. At the end of 2017, a man entered a bus in Banja Luka carrying two bags with 36 hand grenades, three assault rifles, seven handguns, a mine and hundreds of cartridges with Gothenburg as the destination. He was stopped in the neighbouring country of Slovenia. A 26-year-old woman was stopped at the border to Croatia with three antitank weapons and a hand grenade. Police found four machine guns, three battle rifles, three assault rifles and a large quantity of explosives at the home of a 79-year-old man. According to a UNDP official, getting civilians to give up their arms to state authorities is complicated as people are then forced to trust that authorities will protect them. Instead, criminals collect the weapons. Some of the missing weapons were used in the November 2015 Paris attacks during which 130 people were killed by jihadists. Other arms were assault rifles used in the 2015 Gothenburg pub shooting.