Majiya told journalists in Kano on Sunday that the action followed many complaints filed by the public which were investigated.
He said three of the 10 officers were Inspectors, demoted to the rank of Sergeants, while the Sergeants among them were demoted to the rank of Corporals.
The spokesman said the corporals were demoted to the rank of constables, while the constables were issued with warning letters.
He noted that among the offences committed by the officers was corruption, incivility to the public, maltreatment as well as the lack of professional conduct.
Majiya added that 18 of the complaints lodged by the public were amicably resolved by the command, as they were mainly due to the lack of understanding by the public.
He urged the public to be watchful and report to the command any strange police action as it would not hesitate to act on it.
The police spokesman, however, urged the public to be law abiding and obey rules and regulations, saying the police were ready at all times to protect lives and property.