HOUSTON, Texas (KTRK) -- Police are investigating a murder-suicide they say stemmed from domestic violence in a northwest Houston parking lot on Monday night.

The Houston Police Department told said that a man showed up to an unsanctioned car meetup in a parking lot at 14191 Northwest Freeway and saw his ex-girlfriend with a new boyfriend.

The man reportedly shot his ex-girlfriend multiple times and shot the new boyfriend once.

Then, police say, he shot the ex-girlfriend several more times and then turned the gun on himself.

The shooter and the ex-girlfriend are dead, and the new boyfriend is at the hospital with a gunshot wound, expected to survive, police said.

Police say a Harris County Sheriff's Office deputy heard the gunshots while driving in the area, and rendered aid to the new boyfriend's gunshot wound.

The shooter has only been identified as a 26-year-old man. Police say the other victims appear to be in their 20s.

If you need help getting out of a domestic violence situation, call the Houston Area Women's Center 24/7 hotline at 713-528-2121 or call AVDA at 713-224-9911. You can also click here to chat with an advocate online. If you are deaf or hard of hearing and need help, call 713-528-3625.