Two people have been taken to a hospital after a package containing a suspicious substance was sent to an MP's office at the Houses of Parliament.

Emergency services rushed to the Norman Shaw Buildings at about 1pm following the discovery of a “potential suspicious substance”.

It is understood a package was sent to the office of Labour MP Mohammad Yasin.

According to some reports, the incident is linked to a letter encouraging people to "punish a Muslim" which has been circulating in London and the UK.

A man and a woman were taken to hospital.

Scotland Yard said the package was being assessed by specialist officers as cordons were put in place.

A spokeswoman said earlier: "We are aware of a potential situation involving a suspicious substance which the Met Police are investigating.

"There has been no evacuation, but the affected area has been cordoned off."

Police added in a statement: “We were called at 12.58pm to reports of a suspicious package at Norman Shaw Buildings, Victoria Embankment, Westminster.

“Specialist officers attended and the package is being assessed.

“London Ambulance Service attended. A man and a woman have been taken to a central London hospital as a precaution.”