Nine Arlington police officers have been fired after an investigation into whether they exaggerated reports on the number of traffic stops they made.

Lt. Christopher Cook, an Arlington Police Department spokesman, said in May that an audit revealed "suspicious" reports of traffic stops. Fifteen officers were placed on paid leave then while the city investigated; an additional officer was put on leave later.

Cook said in a news release Friday evening that the nine fired officers all sustained administrative charges of being untruthful on department reports, not conforming with the law and unbecoming conduct. Two of the nine also had an administrative charge related to testimony and answering questions.

Cook said that three other officers left the police department before the investigation was complete. Four employees are still under investigation, he said.

Cook did not release the officers' identities.

A criminal investigation of the officers' actions has been sent to the Tarrant County district attorney.

No fictitious citations were given to motorists, Cook said.

Officers record the reason for a traffic stop and information about the motorists in their reports, as well as whether the vehicle was searched or an arrest was made. The department analyzes the data for an annual report on whether racial profiling is occurring.

Cook said in May it did not seem like the number of fake stops in the officers' reports would affect the annual report.

The Arlington Police Department has about 625 officers.