The Policing Minister had her handbag stolen during a speech to top cops.
Dame Diana Johnson was addressing the Police Superintendents Association conference in Midlands on Tuesday when her possessions were swiped.
The Home Office has launched a probe amid security “risks” after the bold theft from a four-star hotel in Kenilworth filled with senior officers.
Warwickshire Police have arrested and bailed a 56-year-old man for burglary.
The theft occurred as the new minister criticized the rise in shoplifting and theft during her speech, promising to get “serious about tackling crime” and “rebuilding confidence” in the police.
A source said: “Home Office security are working with partners to mitigate any foreseeable risks.”
During her address, Dame Diana also highlighted the increase in thefts in recent years.
She told police chiefs: “Too many town centres and high streets across the country have been gripped by an epidemic of anti-social behaviour, theft and shoplifting, which is corroding our communities and cannot be allowed to continue.
“There are thousands of incredible police officers and support staff doing an admirable job.
“But we do have to face the reality that there are still too many victims of anti-social behaviour who feel that when they call the police, no one listens, no one comes and nothing is done.”
As policing minister, she will have access to highly sensitive information although the contents of her bag remain unknown.