Mr Rajab, who heads the non-governmental Bahrain Centre for Human Rights (BCHR), was arrested at the airport late on Saturday over charges of "participating in illegal assembly and calling others to join," the centre said in a statement.
His trial is expected to begin on Sunday.
"Nabeel Rajab arrested by order of public prosecution. All legal procedures are being taken," the interior ministry said on its Twitter account.
Mr Rajab was returning from Lebanon where he met the representative of the UN High Commissioner for Human Rights, according to activist Mohammed al-Maskati, who travelled with him.
He was led away by people in plainclothes, Mr Maskati wrote on his Twitter page.
The BCHR said Mr Rajab could face further charges, as he was summoned for interrogation on April 26 accused of "insulting the statutory bodies". » | Source: AFP | Sunday, May 06, 2012
