Suffolk County District Attorney Daniel F. Conley said Monday there was “no evidence whatsoever” that the man accused of killing two doctors in their South Boston penthouse had a “personal relationship” with the victims, contradicting earlier comments from police officials.

“There is no evidence whatsoever at this stage that the defendant had a personal relationship with either Dr. Field or Dr. Bolaños . . . nor is there any evidence to explain why he would attack them so viciously,” Conley said at an afternoon news conference.

Conley said police are still investigating the motive in the killings of Lina Bolaños, 38, and Richard Field, 49. Officials previously said that the two doctors and their accused killer, Bampumim Teixeira, were known to each other, but did not say how.