Police seized $131,000 worth of drugs and rounded up dozens of people in a month-long sweep of the Brooklyn Park area.

Seventy people have been arrested or have charges pending against them as a result of Operation Street Sweep, authorities said. Police said the sweep focused on the neighborhoods hugging the county-city line because suspects have been crossing it to commit crimes.

"It's not so much that crime is bleeding over the line. I think it is more of an opportunistic thing," said Lt. James Fredericks, spokesman for the county police department. "Suspects think if they go into the county and commit a crime, and then jump...