Investigators from the Bel Air Police Department are searching for two men who attempted to rob the Del Mobil Service Center Wednesday in the 800 block of Conowingo Road.
Witnesses said two men walked into the station about 9:15 p.m. As one bought a pack of gum, the second grabbed the attendant from behind and held a knife to the attendant's throat.
Police said the first suspect could not open the cash register and ordered the attendant to open it.
The attendant refused and the suspects fled.
Anyone with information about the incident should call the Bel Air Police Department at (410) 638-4500.
In other recent police matters in Harford County:
* Undercover officers said they bought drugs from two men about 3:30 p.m. Thursday and arrested them minutes later as the men drove away, a spokesman for the Harford County Sheriff's Office said Friday.
James Scott Anderson, 37, of the 200 block of Law St. in Aberdeen and John Malcolm Hunter, 41, of the 100 block of Haverhill Road in Joppa were charged with possession of cocaine with intent to distribute.
Mr. Anderson is being held in lieu of $25,000 bond. Mr. Hunter, whose home was searched after the arrests, is free on his own recognizance, said Sgt. Edward Hopkins, the spokesman.
Narcotics officers said they seized 4 ounces of suspected cocaine, worth an estimated $4,500, from the vehicle and Mr. Hunter's residence.
A 1990 GMC Safari van, a 1988 Toyoto pickup, a .38-caliber pistol and $6,900 also were seized, Sergeant Hopkins said.
* A 76-year-old Edgewood woman was seriously injured after her car collided with a truck on Pulaski Highway in Joppa about 6:30 p.m. Thursday.
State police said Thelma Aretta Heaps of the 600 block of Harbor Oaks Road was traveling north on Joppa Road and had stopped for traffic before attempting to cross the highway.
The truck driver, Thomas Stanley Malatt of the 3600 block of Buffalo Road in New Windsor, was traveling west on Pulaski Highway when his truck collided with Ms. Heaps' car, police said. The light utility truck spun off the highway after the collision, but Mr. Malatt was not seriously injured, police said.
Ms. Heaps was flown by MedEvac helicopter to the Maryland Shock Trauma Center in Balti- more, where she was in serious condition Friday, a hospital said.
* Donna Jean Champ, 35, of the 100 block of Redbud Road in Edgewood was in serious condition Friday at the Maryland Shock Trauma Center after her car collided head-on Wednesday evening with another vehicle in a no-passing zone on Route 24, according to state police and a hospital spokeswoman.
The driver of the second car was Abdullah Al-Zaharani, 26, of the 16th Ordinance Battalion at Aberdeen Proving Ground.