Baltimore's mayor is not mentally or physically stable enough to resign after seven addresses, including her house, were raided by the FBI following $800,000 sales of her book, her lawyer claims.

Catherine Pugh, 69, went on sick leave on April 1st the same day investigations began into allegations of corruption when it emerged she had voted for companies to receive investment that had bought copies of her children's book 'Healthy Holly'.

The embattled mayor said she needed time off to recover from pneumonia, and her lawyer also said she had later developed bronchitis.

Baltimore mayor Catherine Pugh, 69, is not mentally or physically stable enough to decide whether to resign according to her lawyer Steve Silverman

The FBI investigates Baltimore mayor Catherine Pugh's home on Ellamont road yesterday

Documents were seized from the property along with copies of her book 'Healthy Holly' that is at the center of an investigation into alleged corruption

Her lawyer Steve Silverman told The New York Post yesterday: 'She understands the predicament of the city... she just needs to be physically and mentally sound and lucid enough to make decisions.

'She is generally aware that there is a consensus that she should resign.

'For people to make material decisions in their life, they have to be at a certain level of stability.'

He also told the Baltimore Sun that he will continue to 'vigorously defend' the mayor, who is 'entitled the presumption of innocence'.

It follows a raid on her city hall office, two houses, her business Maryland Center for Adult Training, her attorney's office and the office of one of her aides, Gary Brown Jr.

Documents and copies of her book were seized in the first confirmation that federal authorities are also investigating the mayor's activities.

The city hall and her offices were also raided as the investigation widened (pictured)

Her Baltimore home on Ellamont road was also searched. The mayor's spokesman said he did not have a comment on the situation

Mayor Pugh (pictured in June 2018) went on indefinite leave on April 1 amid a scandal related to her $800,000 book deal

FBI spokesman Dave Fitz said FBI and IRS agents were 'executing court-authorized search warrants'.

Official sources have said, although the mayor's book deals are part of the enquiry, there is 'more to the picture', reports the BBC.

The mayor’s spokesman, James Bentley, said he had no immediate comment.

Republican Maryland Governor Larry Hogan called on Pugh to resign.

'Now, more than ever, Baltimore city needs strong and responsible leadership', he told The Baltimore Sun.

'Mayor Pugh has lost the public trust. She is clearly not fit to lead. For the good of the city, Mayor Pugh must resign.'

Pugh is accused of corrupt practices in selling her self-published series of children's books to the University of Maryland Medical System and Kaiser Permanente, entities that do business with the city of Baltimore

Agents also searched Maryland Center for Adult Training which is one of Pugh’s businesses

FBI agents were captured by TV cameras while they carried out a search of her home

Pugh cannot be removed from office unless she is convicted of a crime.

It has emerged that the University of Maryland Medical System, where she was on the company's board of directors, paid $500,000 for copies of her book.

Healthcare company Kaiser Permanente also paid almost $200,000 for copies of her book, and also received a $48million contract from the city after she voted for it.

The Association of Black charities, which contributed $87,000 to help with the book's distribution, also received a $13million deal from Baltimore.

In addition, Grant Capital Management revealed it had given $100,000 towards helping the books sales to 'tackle childhood obesity'.

Pugh became Baltimore's mayor in 2016. The next year, Baltimore's spending board, which is controlled by the mayor, awarded a $48 million contract to the Kaiser Foundation Health Plan of the Mid-Atlantic States Inc. Kaiser previously held that contract.