A 27-year-old woman was stabbed to death by her husband along the H-3 freeway in Kailua Wednesday evening, Honolulu police alleged this morning.

Lt. Deena Thoemmes, of HPD’s Criminal Investigation Division, said the attack occurred about 6:18 p.m. on the side of the freeway. Witnesses described a man standing over the woman and stabbing her multiple times, she said.

Thoemmes said the witnesses tried to help the woman and restrain the man, but he fled into the nearby brush. The woman was taken by Emergency Medical Services personnel to Adventist Health Castle Medical Center where she was pronounced dead at 8:31 p.m.

Police found and arrested the suspect, who had self-inflicted stab wounds from the same knife used to attack the woman, Thoemmes said at a news conference at HPD headquarters.

He is in a hospital and in police custody, she said.

The identities of the suspect, a member of the military, and the victim were not released.

Thoemmes said witnesses told police that the couple were seen arguing before the stabbing.

Police are working with the Honolulu prosecutor’s office seeking to investigate past possible domestic violence incidents involving the couple. The investigation will include social media posts that Thoemmes said have been brought to HPD’s attention.

The attack occurred off the H-3 westbound lanes near the Kamehameha Highway off-ramp, she said.