Two elderly Washington residents--a 73-year-old man and a 72-year-old woman--were killed over the Christmas holiday weekend in separate incidents that District police speculate had robbery as a motive.

Police identified the man as John G. Glymph of 642 Morton Pl. NE. Glymph, a disabled former construction worker known in the neighborhood as the "Mayor of Morton Place," was discovered dead Sunday night by a neighbor.

Dorothy Saffell, who lives upstairs from Glymph, said she "heard all this banging and noise" at about 9:30 p.m. and went down to Glymph's apartment to investigate. She found Glymph lying face down on the living room floor, bleeding from multiple stab wounds in his torso.

Glymph also was known in the neighborhood as "Big John." Formerly well over six feet tall and weighing as much as 285 pounds, neighbors said, Glymph had a stroke about 10 years ago that left him frail, needing a cane to walk.

Neighbors said Glymph spent warm days outside his brick row house, greeting neighbors as they passed. "He knew everything that went on on the whole block," Saffell said.

The woman was identified by police as Naomi Buckner of 3155 Mount Pleasant St. NW. She was discovered dead on Christmas morning on the living room floor of her first-floor apartment. Bound and gagged, she apparently had been strangled by her assailant, police said.

Police said Buckner's apartment appeared to have been ransacked although there were no signs of forcible entry.

No suspects in either case have been arrested, police said.