Police investigating alleged serious abuse at a care home near Bristol after undercover filming by BBC Panorama have arrested five more people.
The programme alleged serious abuse was carried out at Winterbourne View Hospital - a private care home for people with learning disabilities.
Police arrested two women, aged 22 and 21, and three men, aged 58, 40 and 28.
Last week, a woman and three men were arrested. All nine have been released on police bail pending more inquiries.
The programme showed some of the hospital's most vulnerable patients being repeatedly pinned down, slapped, dragged into showers while fully clothed, taunted and teased.
The hospital's owners, Castlebeck, have apologised and suspended 13 employees.
Three men - aged 42, 30 and 25 - and a 24-year-old woman were arrested following the broadcast of the programme last week.
The hospital, which is taxpayer-funded, is to be investigated by the Care Quality Commission.
Labour leader Ed Miliband has called for an independent inquiry into the alleged abuse, saying he was "sickened" by what the programme showed.
The Care Quality Commission has said, following an internal review, that it recognised that "there were indications of problems at this hospital which should have led to us taking action sooner".
"We apologise to those who have been let down by our failure to act more swiftly to address the appalling treatment that people at this hospital were subjected to," it said.
The vulnerable patients filmed by Panorama have been moved to safety.