The number of complaints made about "stop-and-search" incidents have risen by nearly a quarter, the police watchdog has said.
Police forces in England and Wales received 536 complaints about stop-and-search in the last financial year, up from 434, the Independent Police Complaints Commission (IPCC) said.
Stop-and-search grievances made up 3% of complaints by black people, the report revealed.
Opponents of stop-and-search say it unfairly targets minority groups, but the recent spate of high-profile knife crimes has led to greater use of the powers.
Figures released earlier this year showed police carried out 955,000 stop-and-searches in 2006/07, up 9%. Black people are seven times more likely to be stopped as white people, Ministry of Justice statistics showed.
The overall number of complaints against the police remained steady, after rises in recent years, the report found. The 43 forces received 28,963 complaints, ranging from impoliteness to assault. Most concerned failures to investigate crime properly or abusive language or behaviour.
There was also a 9% increase in the number of complaints from Asian people, investigators found.
Of the stop-and-search grievances, only 169 needed to be investigated, and 88% of those were found to be unfounded.
Officers from the Association of Chief Police Officers (ACPO) said the figures needed to be seen "in the context of over 950,000 stop-and-searches carried out annually in England and Wales".
But Liberty director Shami Chakrabarti said: "Stop and search is one tool of policing but use it as a bludgeon not a rapier and you alienate far more people than you protect. Formal complaints about stop-and-search are inevitably the tip of the iceberg, as the young and most vulnerable lack the confidence to complain."
