Authorities say a shooting early Monday in Waikiki was apparently a murder and an attempted suicide in which a 33-year-old woman was killed and a 40-year-old man was hospitalized with serious injuries.

City Emergency Medical Services personnel said both the man and woman received gunshot wounds.

Paramedics took the man to the Queen’s Medical Center from the 100-unit Ala Wai Townhouse condominium at 2421 Ala Wai Blvd. after being called to the building about 4:25 a.m. Monday.

Police Capt. Lisa Mann said there are no other suspects in the apparent murder-and-attempted-suicide the case, but declined to reveal how the woman was killed.

Police would not say whether the 911 call originated from the 20-story condominium.

Two Army criminal investigators also were called to the scene. One of them said they were there because the man involved was believed to be a soldier.

Several people who live in the building said they didn’t hear any shots Monday morning. But residents from nearby apartment buildings said they heard multiple gunshots during the weekend.

Larry Trusedell, who lives in a neighboring building, said, "I heard five to seven shots. When I looked out I expected to see police, but I saw nothing."

Johnny Rox, who also lives next door to the Ala Wai Townhouse, also reported hearing gunfire this weekend. "The cops are here all the time," he said.

Police said they are investigating whether those reports are related to the shooting.

An autopsy is scheduled for today.

Police would not reveal the relationship between the man and woman.

However, many, if not most, murder-suicide cases involve couples.

"There have been an increasing number of murder-suicides in the last five years," Domestic Violence Action Center Chief Executive Officer Nanci Kreidman said Monday. "It gives real meaning to the threats we often hear from abusers."

On the possibility the suspect is in the military, Kreidman said: "We are counting on our military colleagues to take seriously domestic violence like their civilian counterparts, respond appropriately to save the lives of our military members and their families, so they don’t end up with a homicide on their hands.

"If there is a history of domestic violence, they should not have a weapon," she said.

Victims of domestic violence should be alert to remarks such as: "If I can’t have you, no one will," and "What do I have to live for if I don’t have you?"

"Those are very, very significant red flags for victims who live with abusers," she said.

Kreidman said it’s hard to assess whether an abuser will make good on those threats, so it’s up to the victim to seriously consider consulting domestic violence programs if one’s abuser starts to make life-threatening remarks.

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Star-Advertiser reporter Leila Fujimori contributed to this report.