Two elderly people were tied up and robbed in their home Saturday by a man who was wielding a 10-inch kitchen knife.

Salt Lake police said a man entered a home on Hubbard Avenue through an unlocked back door. The robber cut the telephone lines with his knife and then tied up a 79-year-old man and a 75-year-old woman with the phone cord, a police report stated.The man took some costume jewelry, a small amount of cash and some keys and then fled the home. The victims - unharmed - were able to untie themselves and phone police.