A jury convicted seven men of sexually abusing two girls in the Greater Manchester region of England, British authorities announced Friday.

A Manchester court tried Mohammed Zahid, 64, Mushtaq Ahmed, 66, Kasir Bashir, 50, Roheez Khan, 39, Mohammed Shahzad, 43, Nisar Hussain, 41 and Naheem Akram, 48, and found them guilty of sexually abusing the girls in the town of Rochdale between 2001 and 2006, the Crown Prosecution Service (CPS) said. Both girls were aged 13 at the time the abuse started. CPS labeled the case one of “the most complex and challenging sexual abuse cases.”

The jurors ruled that Ahmed and Bashir abused one of the girls while Khan, Shahzad, Hussain and Akram abused the second. Zahid was found guilty of abusing both girls. He employed the victims in his market stall, and they called him “Boss” and “Bossman,” according to the CPS.

The “vulnerable children” — who authorities said did not know each other — hailed from “vulnerable backgrounds” and were on the radar of social services. The CPS said one of the pair was in the care system while she was being abused.

Zahid not only employed the girls but also groomed them using monetary and other gifts and had them use alcohol and drugs before the abuse. It was expected that they would engage in sex acts with additional men, with Ahmed, Bashir and Khan among them, authorities said.

Shahzad befriended one of the girls and gave her lifts in his taxi. Shortly, he would often give her alcohol, violate her and then pass her around among some fellow taxi drivers including Akram and Hussain, the CPS said.

“I must start by paying tribute to the two survivors in this case,” Detective Chief Inspector For Greater Manchester Police Guy Laycock said. “They have been pivotal in bringing these abusers to long-awaited justice by bravely giving painful and difficult testimony during a four-month trial. Without them this would not be possible and today is about them.”

“These seven men preyed upon vulnerability for their own depraved sexual gain. The men abused, degraded and then discarded the victims when they were just children,” he continued.

Zahid and Khan had been convicted and jailed in two other grooming gang cases in 2016 and 2013 respectively, The Guardian reported. Bashir jumped bail and did not attend the trial, but authorities revoked bail for Shahzad, Akram, and Hussain. This followed an intelligence report that they planned to flee Britain, according to testimony. (RELATED: Cops Abandoned Victims Of UK Grooming Gang That Repeatedly Raped Underage Girls, Report Says)

One of the victims told the court that her abusers numbered possibly over 200 but said she lost count. The other alleged that social workers were not sufficiently concerned, testifying that they suspected her of being a “prostitute” at 10 years old.

The Rochdale sexual abuse scandal rocked the U.K. The British government has faced accusations of a cover-up of migrant rape gangs of girls in the country amid growing concerns over illegal immigration.