Similar robberies reported in Hacienda Heights, Diamond Bar

Authorities are investigating two similar gas station robberies that occurred early Saturday in Hacienda Heights and Diamond Bar, sheriff's officials said.
The robbers were described similarly in both crimes, which occurred within an hour of each other, however officials said it was too early to tell if they were related.
The first of the robberies was reported about 1 a.m. at an ampm store at 1401 S. Hacienda Boulevard in Hacienda Heights, Los Angeles County sheriff's Sgt. Raymond Enriquez said.
A robber described as a black man of about 6 feet 1 inch tall and wearing a black jacket entered the store and announced his intention to rob it, the sergeant said.
He threatened to have a gun, though none was seen, Enriquez added.
An employee sprayed the robber with pepper spray, he said, but the robber still managed to grab a cash drawer from a register.
He fled to a getaway car with a waiting male driver, who also threatened the clerk, Enriquez said. The car then fled westbound.
No description of the car or the driver was available.
Just under an hour later, another robbery was reported at a Chevron Station at 21324 Pathfinder Road in Diamond Bar, sheriff's Lt. Mike Browne said.
Two robbers described as black men of about 6 feet tall wearing dark clothing entered the store about 1:45 a.m. and demanded cash, the lieutenant said. At least one of them was armed with a handgun.
After stealing an undisclosed amount of cash, the robbers were last seen fleeing on foot, he added.