Three violent incidents that happened Wednesday morning are unrelated, DeKalb Police said.

An unidentified man robbed a woman at 8:10 a.m. while she was at the north side of the Wal-Mart parking lot, 2500 Sycamore Rd., police said.

The man threatened to shoot the woman, police said. He did not display a gun, but the woman gave him her wallet, police said. The man took $20, threw the wallet back and then ran north, police said.

The robber is described as a 6-foot-tall, unshaven white man with long dirty, bushy, dark brown hair, police said. He wore a dirty blue jean jacket, brown pants and a gold ring set with a red stone, police said.

In an earlier incident, a woman was grabbed from behind by a man as she walked to her car in the 1000 block of South Fifth Street, police said. The woman broke free and ran, but the man chased her, grabbed her again and hit her in the face, police said.

The woman kicked her attacker and threw her purse at him, police said. Although the left sleeve of her coat was torn, the woman escaped, police said. Her attacker is described as a tall man wearing brown clothing, police said.

In another incident, a man and woman who were walking in the 800 block of Normal Road were surrounded and attacked by five black men, police said. The men hit the woman, knocked her to the ground and kicked her, police said.

The man tried to help the woman but was also beaten, police said. The two victims ran toward the Holmes Student Center and were pursued by their attackers, police said.