TRENTON - Police in Trenton have stepped up efforts to curb violence in New Jersey's capital city.

Authorities made 41 arrests between Friday and Sunday after a spike in violent crime was punctuated by 20 shootings in the last 30 days.

Officers executed search warrants, conducted DWI patrols, and stopped people and vehicles as part of "Operation Send a Message."

Police have responded to 503 shots fired calls this year. Forty-two people were shot in Trenton between January and mid-August 2010 compared to 82 victims during the same period this year.

Police officials say the focus will continue to be violent offenders even as the department faces the layoffs of 108 officers next month.

AP wire services contributed to this report.