Detectives investigating allegations of historic sexual abuse at a school in East Sussex have arrested a second man.

The 64-year-old was arrested in Brighton on Tuesday (September 9), on suspicion of indecent assault and gross indecency.

He was interviewed and released on bail until March 10, 2015 while enquiries continue.

Sussex Police was contacted in January by a firm of solicitors representing "a number" of clients who said they were sexually and physically assaulted by staff while pupils at Ashdown House School, near Forest Row, in the 1970s.

Detective Inspector Mark O'Brien said today police had been in contact with 20 people who had reported offences, including the firm's clients, and most had been interviewed by child protection officers.

He added: "Arrangements are in hand to interview the others, some of whom live abroad.

"The investigation continues and now spans a period from the late 1950s to the early 1990s.

"Reports of this kind are always taken seriously, no matter how long ago the offending is said to have occurred."

He encouraged anyone with information relevant to the enquiry, or abuse victims during that period who have yet to come forward, to contact police quoting Operation Mitre.

DI O'Brien stressed there were no current safeguarding issues at the school in relation to the enquiry.

A 69-year-old man from Barcombe, near Lewes, was arrested on July 9 on suspicion of sexual assaults and child neglect. He is on bail until November 11.

Contact police by emailing 101@sussex.pnn.police.uk or calling 101, quoting Operation Mitre.