The treatment of black people by the police on issues such as stop and search and the national DNA database has worsened since the official inquiry into the murder of Stephen Lawrence 10 years ago, according to MPs.

A report published by the Commons home affairs select committee tomorrow says the police have made some “tremendous strides” in the past decade in the way they investigate race crimes and other criticial incidents involving minority ethnic communities, but MPs say there remains a number of outstanding concerns.

“Black communities in particular are disproportionately represented in stop and search statistics and on the national DNA database; in fact, the gap has increased,” they conclude.

The cross-party group of MPs say that black people are now seven times more likely to be stopped by the police than white people. A decade ago, when the Macpherson report into the murder of black teenager Stephen Lawrence was published, black people were six times more likely to be stopped.

The MPs also heard evidence that more than 30% of all black men who have been arrested now have their DNA profiles logged on the national DNA database, compared with 10% of all white men and 10% of all Asian men. The committee also expresses its disappointment that the police still fails to meet its target of employing 7% of its officers from minority ethnic communities by 2009.

They are also concerned that black and minority ethnic officers continue to experience difficulties in achieving promotion, as well as being more likely to be subject to disciplinary procedures. Keith Vaz, chairman of the home affairs select committee, said such disproportionate representation of black people in the criminal justice system would continue to damage community relations.

The home secretary, Alan Johnson, said the majority of Macpherson’s recommendations had been implemented, bringing many positive changes in race equality.