Northern Ireland republican leader Gerry Adams has spent the night in police custody after being arrested in connection with the 1972 murder of a mother of 10, Jean McConville.

Speaking before his detention on Wednesday evening, Mr Adams said he was "innocent of any part" in the murder.

Mrs McConville, a 37-year-old widow and mother-of-10, was abducted and shot by the IRA.

Her body was recovered from a beach in County Louth in 2003.

Police said a 65-year-old man presented himself to officers at Antrim police station and was arrested.

In a statement, Sinn Féin said: "Last month Gerry Adams said he was available to meet the PSNI about the Jean McConville case. That meeting is taking place this evening."

Mr Adams added: "I believe that the killing of Jean McConville and the secret burial of her body was wrong and a grievous injustice to her and her family.

"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."

His party colleague Alex Maskey condemned the timing of the arrest, just over three weeks from the European and local government elections.

However, Mrs McConville's son Michael, who was 11 when his mother was murdered, welcomed the arrest.

"We're just happy to see everything moving as it is moving at the minute," Mr McConville said.

"Me and the rest of my brothers and sisters are just glad to see the PSNI doing their job. We didn't think it would ever take place [Mr Adams' arrest], but we are quite glad that it is taking place.

"All we're looking for is justice for our mother. Our mother, on the seventh of next month, would have been 80 years of age.

"Although we didn't spend much time with our mother, we'd have like to have spent a lot of time with her. If the IRA hadn't have killed our mother, God knows, she still might have been alive today."

Mrs McConville, one of Northern Ireland's so-called Disappeared, was kidnapped in front of her children after being wrongly accused of being an informer.

Last month, Ivor Bell, 77, a leader in the Provisional IRA in the 1970s, was charged with aiding and abetting the murder.

There have also been a number of other arrests over the murder recently.