Each city and borough shall be liable for all injuries to person or property, including injuries causing death, when such injuries are caused by an act of violence of any person or persons while a member of, or acting in concert with, any mob, riotous assembly or assembly of persons engaged in disturbing the public peace, if such city or borough, or the police or other proper authorities thereof, have not exercised reasonable care or diligence in the prevention or suppression of such mob, riotous assembly or assembly engaged in disturbing the public peace. Any person claiming damages under this section from any city or borough shall give written notice to the clerk of the city or borough of such claim and of the injury upon which such claim is based, containing a general description of such injury and of the time, place and cause of its occurrence, within thirty days after the occurrence of such injury; and an administrator or executor seeking to recover damages for the death of a decedent whom such administrator or executor represents shall give such written notice within thirty days after his or her appointment; provided such notice shall be given not later than four months after the date of the injury so causing the death of the decedent whom such administrator or executor represents. The expense for which such city or borough is made liable to the state under the provisions of this section shall, if more than one municipal corporation is jointly responsible for the expense aforesaid, be assessed by the Secretary of the Office of Policy and Management, the Attorney General and the Comptroller, acting as a board of assessors. Such board of assessors may apportion such expense among the different municipal corporations so jointly responsible in such manner as to it seems just. An appeal from the action of such board of assessors may be taken to the superior court for the judicial district in which the appellant city or borough is situated, and, if the cities or boroughs concerned are located in different judicial districts, then such appeal may be taken to the superior court for that judicial district in which the city or borough concerned having the largest population according to the last-preceding census is located. The amount of such assessment against any city or borough for which it is liable to the state under the provisions of this section shall be certified to the clerk of such city or borough by the Comptroller as soon as such assessment is made, and the appeal from such assessment provided herein shall be taken by such city or borough within thirty days from the receipt by it of such certificate of assessment by the Comptroller.