LONDON (AP) — About 1,400 children were sexually exploited in a northern England town, a report concluded Tuesday in a damning account of “collective failures” by authorities to prevent victims as young as 11 from being beaten, raped and trafficked over a 16-year period.

Report author Alexis Jay cited appalling acts of violence between 1997 and 2013 in Rotherham, a town of some 250,000. The independent report came after a series of convictions of sexual predators in the region and ground-breaking reports in the Times of London.