Woman arrested over Real IRA bombs

The Omagh bombing was Northern Ireland's worst terrorist attack

LONDON, England (CNN) -- A woman has been arrested in north London on charges of terrorism linked to a bombing campaign by the Real IRA, an Irish nationalist splinter group opposed to the Northern Ireland peace process.

The 35-year-old woman was arrested on Friday morning and was being questioned at a central London police station. Police would not discuss her nationality or say which bombing incident she is believed to have participated in.

The woman was charged under the Terrorism Act of 2000, which allows police to hold suspects without charging them for long periods of time.

The Real IRA claimed responsibility for planting a car bomb in the centre of Omagh, in Northern Ireland in August 1998 that killed 29 people including a woman pregnant with twins and wounded more than 200.

EXTRA INFORMATION • IN-DEPTH: Conflict and hope in Northern Ireland    RESOURCES Message Boards: Peace in Northern Ireland?

The group had split from the main Irish Republican Army earlier that year to oppose the decision by the IRA's political allies Sinn Fein to support the Northern Ireland peace process and work to end 30 years of fighting in Northern Ireland. This culminated in the Good Friday peace accord of April 1998.

Two men face trial in May in connection with a series of bomb attacks blamed on the Real IRA in London and Birmingham.

Six people were arrested late last year in an investigation of dissident Irish Republican terror groups.

The Real IRA said they planted the bomb in Omagh

No one in Northern Ireland has yet been charged in connection with the Omagh atrocity. One man is currently being tried in the Irish Republic on charges of conspiracy to cause an explosion. A verdict is not expected until Tuesday at the earliest.

An independent report released in December into the Omagh car bombing accused police chiefs of bungling the investigation.

The report by Nuala O'Loan, who as police ombudsman investigates complaints, also said Northern Irish police under Chief Constable Sir Ronnie Flanagan had failed to act on tips warning that an attack was imminent and that Omagh was a possible target.

Flanagan said the findings were a "desperate attempt" to justify an "erroneous conclusion reached in advance."