Sinn Fein president Gerry Adams has voluntary presented himself to police investigating the abduction and murder of Jean McConville in December 1972.
A statement on the Sinn Fein website said Mr Adams submitted himself to questioning by the Police Service of Northern Ireland as part of their investigations.
Mr Adams said: “Well publicised, malicious allegations have been made against me. I reject these.
“While I have never disassociated myself from the IRA and I never will, I am innocent of any part in the abduction, killing or burial of Mrs McConville.
Adams attacks reasons for his detention and denies McConville murder
It is claimed IRA volunteers described what happened the night Jean McConville was murdered to Boston College's "Belfast Project".