An undercover police task force in Prince George's County has arrested 59 suspected drug dealers and buyers since Wednesday, breaking up a marijuana and PCP operation that provided "curb service" from the parking lots of Landover apartment complexes, police said yesterday.

About 30 county police officers and sheriff's deputies swept through the Landover area, making 32 arrests on Wednesday and 27 more Thursday and confiscating drugs worth about $850, mostly marijuana and PCP. Also confiscated was nearly $600 in cash.

The arrests represent the largest number made in one sweep since the task force -- code-named Wolfpack -- began operating in April, a police spokesman said. Since then, the undercover operation has made 120 felony and 83 misdemeanor arrests, confiscating drugs worth $21,600 and $11,073 in cash, police said. The task force is in its fourth year and operates in the spring and summer.

Those arrested Wednesday and Thursday range in age from 17 to 51, police said, and include 54 adults and five juveniles. Most have been released on bond or personal recognizance, police reported.

"It's an ongoing problem," police spokesman Bob Law said of the drug dealing. "You move them from one area, they go to another."

The recent arrests were made in the 7200 block of Landover Road and the 7300 block of Hawthorne Street, he said. Residents of the area had complained about the parking-lot drug sales, Law said. Also, other crimes in the area had increased as a result of the drug operation, with prospective buyers often robbed of their money, he said.

In addition to Landover, the task force has concentrated this summer in the Fairmount Heights and Suitland areas, according to Law.