Three emergency medical workers and two of their patients were killed last night when their ambulance was struck broadside by a tractor-trailer and burst into flames in northwestern Paulding County, the Ohio Highway Patrol said.

Another emergency medical worker and the driver of the semi were hurt in the crash just before 7 p.m. between Paulding and Cecil, Ohio, about 65 miles southwest of Toledo, troopers at the patrol's Van Wert post said.

The Ohio State Highway Patrol's Van Wert Post released the names this morning of the five people killed in the crash. The emergency workers from Antwerp were: Sammy R. Smith, 64; Heidi L. McDougall, 31, and Kelly J. Rager, 25.

The victims who were being transported in the EMS squad were identified as Robert R. Wells, 64, and Armelda Wells, 60, both of Hicksville.

A fourth EMS worker, Matt McDougall, 31, of Antwerp, who was in the squad, and Gerald D. Chapman Jr., 54, of Bryant, Ind., the driver of the commercial vehicle, were both transported from the scene. Mr. McDougall, a Hicksville police officer, was in fair condition this morning at Parkview Memorial Hospital in Fort Wayne. Mr. Chapman's condition was unavailable this morning.

The emergency workers were all volunteers from Antwerp, Ohio, who were treating patients from an earlier crash on U.S. 24 in Paulding County.

"It's very sad. Very tragic," Antwerp Village Council President Ronald Farnsworth said. "Right now, we need all the prayers we can get. Right now we're grieving."

The crash occurred at County Roads 176 and 87 in Crane Township.

The ambulance was southbound on Road 87 when it was struck broadside by the semi, which was eastbound on Road 176, troopers said.

No other details on either accident were available last night.

The loss hit hard in the village of Antwerp, population 1,642.

Last night, several dozen fire and emergency workers gathered at the fire hall with a pastor.

"They aren't in very good shape right now," said Mr. Farnsworth, adding that the village planned to arrange for counseling.

"We'll get through it," he said. "But we'll need all the prayers we can get from everybody."