EUCLID, Ohio -- A hostage situation at a medical building in Euclid, Ohio, ended after the gunman shot and killed himself Monday.

The gunman burst into the medical building and held his ex-girlfriend hostage before fatally shooting himself in the head, police said. No one else was hurt.

The man, whose name was withheld until his family could be notified, apparently was determined to force a reconciliation with his ex-girlfriend, police Capt. Dave Brooks said.

Workers at the Euclid Medical Plaza told WEWS-TV in Cleveland that the gunman entered a chiropractor's office on the third floor of the nine-floor building at about 9 a.m. They said held a doctor and his ex-girlfriend hostage for about 90 minutes.

Witnesses said the 28-year-old man had a gun pointed at Dr. Jim Cooper's head.

"Then he pointed the gun at all of us," one man in the office said.

At one point, chiropractor Jim Cooper tried to disarm the man, but the gunman was able to control the weapon, Brooks said.

The gunman eventually ordered his ex-girlfriend's co-workers to leave.

The man had a history of abusive treatment toward the woman, whose name also was withheld until she could be reunited with relatives, Brooks said.

A hostage negotiator talked by phone with the gunman for nearly an hour before he shot himself in the head, Brooks said. A hostage negotiator heard gunshots before the ex-girlfriend came out of the office.

SWAT team members found the gunman dead in the office. He was removed from the building on a stretcher. His ex-girlfriend was shaken, but not injured.

Police said there is a history of domestic violence between the pair. They also said the gunman had attempted suicide once before.