A LETTER bomb has exploded at an office in central London.A woman has been taken to hospital suffering with minor injuries following the explosion at the business address less than a mile from the Houses of Parliament.

A LETTER bomb has exploded at an office in central London.

A woman has been taken to hospital suffering with minor injuries following the explosion at the business address less than a mile from the Houses of Parliament.

The incident happened at around 9.40am. Scotland Yard's anti-terrorism unit is currently investigating the incident which was described as a small explosion at the business in Victoria Street.

The Met Police's explosives unit was at the scene.

A London Ambulance spokesman said: "Our crews have treated a female patient for minor injuries and conveyed her to hospital. We are still currently on the scene.

"We were called at 9.39 today to an incident in Victoria Street. We sent two ambulances, a duty manager and three support vehicles.''

A fire brigade source said the explosion was caused by a letter bomb.

The main road outside the building, which is just 200 yards from Scotland Yard, was closed off with a cordon set up around the entrance of the building.