U.S. Park police have arrested a Washington man wanted by Montgomery County in connection with the slaying of a supermarket manager at the Hillandale Grand Union last March, and for another incident a week earlier in which the manager of a nearby Safeway was shot during a robbery.

Leroy Jenkins, 22, of 1012 3rd St. SW is being held in D.C. jail in lieu of $5,000 cash bond on fugitive warrants for robbery and murder at the Grand Union where the manager, Robert D. Lamp, was fatally shot March 27. g

Jenkins is also wanted on robbery charged stemming from an incident at a Safeway store at 1017 New Hampshire Ave., a hundred yards away from the Grand Union. On March 21, assailants herded employes at the Safeway into a dairy cooler, wounded the manager and fled with $400.

Jenkins who faces an extradition hearing June 10, was arrested by Park Police after he made an illegal left turn near the Lincoln Memorial Circle yesterday morning. Park police officers ran his name through a computer and found he was wanted in Montgomery County. He was turned over to the D.C. police's fugitive squad.

Another man, Lawrence Jerome Dudley, 25, of 237 K St. SW, is also being held in connection with the Grand Union incident. Dudley is in the D.C. Jail on a fugitive warrant, awaiting extradition to Montgomery County where he has been wanted since last April for robbery and murder at the Grand Union, according to county police spokesman Phillip Caswell.