The incident unfolded at about 5:30 a.m. As the victim was walking along 37th Avenue South, he was stopped by a man brandishing a black handgun, said Detective Jeff Kappel of the Seattle police.
Then a second man, who was wearing a hooded sweatshirt, grabbed the victim from behind and began to search his pockets. The victim broke free and ran a short distance but was caught and taken to the ground by the hooded man, Kappel said.
The attacker covered the victim's head with his jacket and struck the victim multiple times on the head with a blunt object. The attacker then went through the victim's pockets and removed a cell phone and iPad.
Both suspects fled northbound on 37th Avenue South, then west on South Edmunds Street. The victim walked to a coffee shop in the 3800 block of South Edmunds Street, where he called 911 about a half-hour after the robbery.
Officers quickly arrived but could not find the man's attackers.
Medics treated the victim and he was then taken to Harborview Medical Center with non-life-threatening injuries.
The incident remains under active investigation, Kappel said, adding that there are no suspect descriptions available at this time.
Anyone with information is asked to call 911. Anonymous tips are welcome.