When Michael Rose heard a knock on the back door of his Christiansburg mobile home about 8 p.m. Friday, he assumed it was one of the dozen or so neighbors who regularly stop by to chat.

Instead, he said, he was confronted by the point of a 9 mm semiautomatic pistol. Two masked assailants forced their way into the trailer, Rose said, shoving him toward the kitchen sink.

"One of them put a gun between my eyes," Rose said. "The other went straight to my bedroom and held a gun on my wife."

The two-minute alleged heist at Conners Mobile Home Park in the 2100 block of Fairview Street left Rose, 49, and his wife Karen, 55, shaken but uninjured. Their 6-year-old grandson Harley also was home at the time.

The gunmen took a pocketbook containing Oxycontin and other medication, several hundred dollars in cash, some credit cards and keys to the Roses' car and home, Rose said.

Rose said he believes he and his wife were targeted for the medication. He said the alleged assailants knew what they were looking for.

Christiansburg Police searched the area using a bloodhound, though nobody has been arrested in the incident, according to Capt. Chris Ramsey.

Ramsey said the area has not seen crime like this in "quite some time."