Authorities in Porrentruy, a border town in Switzerland’s Jura canton, have barred most non-resident foreigners from the municipal outdoor pool after a surge in harassment, vulgar behaviour and overcrowding linked largely to youths crossing from neighbouring France. The decree, effective from 4 July to 31 August, permits entry only to Swiss nationals, local residents with settlement permits, and individuals holding a valid Swiss work permit. Tourists staying in area hotels or campsites may gain access with a guest card issued by the local tourist office. More than 20 patrons have already been expelled this season for offences that include harassing young women, swimming in underwear and aggression toward staff, officials said. The pool is designed for roughly 1,000 visitors, and the recent heatwave, coupled with the closure of a French pool 20 minutes away in Delle, has intensified the pressure on the facility. Lionel Maître, the district’s leisure policy chief, said the measure is aimed at restoring a “peaceful, respectful and safe atmosphere.” Mayor Philippe Eggertswyler described the decision as exceptional and temporary, adding that the council will review the restriction at the end of August. A similar residency rule was last imposed during the Covid-19 pandemic in 2020.