A 30-year-old Glendale man who was arrested in connection with the shooting deaths of four people at a Northridge boardinghouse pleaded not guilty this week to unrelated robbery charges, officials said.

Howard Alcantara is charged with robbery and assault with deadly weapon stemming from separate incidents involving the same victim in a case that occurred before the Dec. 2 shootings, according to the Los Angeles County district attorney’s office.

He remained jailed Thursday in lieu of a $500,000 bond after entering his plea on Wednesday.

Alcantara was one of four suspects — including Los Angeles residents Ka Pasasouk, 31; Christina Neal, 33; and Donna Rabulan, 30 — who were taken into custody Dec. 4 at a Las Vegas hotel following the shooting deaths of two men and two women outside the illegal boarding house in Northridge.

Pasasouk, who was arrested on suspicion of murder, also appeared in court Wednesday for a probation violation hearing. He was held without bail.

No charges have been filed against the four suspects in connection with the shooting deaths.

Alcantara is scheduled to appear Dec. 27 in Los Angeles County Superior Court in San Fernando.

-- Veronica Rocha, Times Community News

Follow Veronica Rocha on Google+ and on Twitter: @VeronicaRochaLA.