A technician repairs a surveillance camera's connection at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)

This photograph shows the C7 building at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)

This photograph shows the SN2 building at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)

This photograph shows the P2 building at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)

This photograph shows a damaged bathroom in the P2 building at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)

This photograph shows an out-of-service bathroom in the P2 building at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)

This photograph shows a health center at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)

Students sit on a bench at the Science City Campus of the University of Lille, in Villeneuve-d'Ascq, northern France, on April 30, 2026. (Photo by Sameer Al-DOUMY / AFP via Getty Images)