Two men have been arrested and charged with murder in the deaths of an off-duty Prince George's County police officer and a convenience store employe who were shot June 11 during a holdup at the Goddard Mini-Mart in Greenbelt, police announced yesterday.

Kamel Elfadl, 20, of 2616 Henderson Ave., Greenbelt, was arrested Friday and Kenneth Lodowski, 22, 9733 Good Luck Rd., Lanham, was arrested yesterday morning, police said. They said Elfadl is a former employe of the combination gas station and convenience store at 8711 Greenbelt Rd., and that Lodowski is a former roommate of his.

Police said the two were arrested at county police headquarters in Forestville after they went there voluntarily for questioning.

The two men were each charged with two counts of first degree murder and are being held without bond in the county jail in Upper Marlboro, police said. A bond hearing is set for Monday, they said.

Carlton X. Fletcher, 31, of Palmer Park, a seven-year veteran of the Prince George's Police Department, was slain as he arrived at the store to accompany cashier Minh Phando to make a late-night bank deposit, police said.

Fletcher was hit in the neck by a single shotgun blast as he sat in his marked police cruiser in the store's parking lot.

A window on the driver's side of his police car was shattered by the blast, and blood splattered the windshield and the inside of the car. Police said Fletcher, who was not in uniform at the time, never removed his police revolver. He died about an hour after the 11:45 p.m. shooting.

Moments after that shooting, a second shotgun blast hit Phando in the chest. He died the next day.

Police said the robbers fled with more than $20,000 from the store and that an undisclosed amount of the money has been recovered.

Lt. Col. Joseph Vasco of the Prince George's Police Department said the arrests came after a six-day manhunt that totaled 1,200 hours of work by Prince George's, Montgomery and District officers and federal agents. Police had offered a $50,000 reward for information leading to an arrest, but Vasco said yesterday the arrests were the result of police work.