Home Secretary Sajid Javid said:
The death of Dawn Sturgess is shocking and tragic news and I want to express my sincere condolences to her family and friends. This has now become a murder investigation and police and security officials are working around the clock to establish the full facts of the incident.
This desperately sad news only strengthens our resolve to find out exactly what has happened.
As I said earlier today when I visited Amesbury and Salisbury, the government will continue to provide the local community all the support it needs.