PALO ALTO -- Police released a sketch Sunday of the suspect they say robbed a man at gunpoint after he parked his car at an apartment complex.

The robber struck around 8:45 a.m. Saturday in the parking lot of apartments on the 1000 block of Tanland Drive. No one was injured and no arrests have been made, said Palo Alto police Lt. Zach Perron.

Police were investigating whether this hold up was committed by the same person who robbed a man and woman Jan. 22 as they walked on the 300 block of Ramona Street. Police said the description of robbers in both crimes is similar. Saturday's crime started when a man in his 40s parked in a carport at the apartments on Tanland. He spotted someone pacing back and forth as he pulled in and found it odd, but still got out of his car. As the victim walked, the robber sprang from behind a wall and pointed a black semi-automatic pistol at the victim's stomach.

The robber ordered the man back into his car, demanded his wallet and then took off running once he got it. Police said the robber escaped through Greer Park near the basketball courts. He was a black man in his late 20s or early 30s, about 5 feet 8 inches tall and thin. He wore a grey tracksuit and had a hood pulled up over his head, police said.

Anyone with information about the crime can call Palo Alto police at 650-329-2413.

Contact Joshua Melvin at 650-348-4335. Follow him at Twitter.com/melvinreport.