Three men dressed in black and wearing ski masks forced their way into a Kailua home early yesterday, assaulted two residents and fled with an undisclosed amount of cash.

The home invasion robbery on the 600 block of Maluniu Avenue occurred at about 1:30 a.m. Police have made no arrests.

A 48-year-old man and a woman, 47, were hit on their heads, possibly with a pipe, police said. The man refused treatment but the woman was taken to Castle Medical Center, where she was found to have bleeding in the brain, police said. Because of the woman’s injury, police are also investigating the case as an attempted murder.

The money was taken from a safe, which the male resident was forced to open, police said.

Families can sue in Xerox slayings

Families of seven Xerox Corp. workers killed in a 1999 office shooting rampage can sue Kaiser Medical Center over its failure to treat convicted murderer Byran Uyesugi, a Circuit Court judge ruled Wednesday.

The ruling is a victory for the victims’ widows, who were barred from suing Xerox directly because they received money from the company’s workers compensation policy.

Victims’ family members have argued Uyesugi had dangerous mental problems that surfaced years before the rampage and the killings could have been prevented if he had received treatment.

Attorneys said Dr. Marvin Mathews, a Kaiser psychiatrist who evaluated Uyesugi six years before the Nov. 2, 1999, shootings, failed to provide follow up care and allowed Uyesugi to return to work after completing an initial mental examination.