CHANDLER, Arizona (AP) — A suspect has been arrested after allegedly killing a co-worker at a microprocessor manufacturing facility in Chandler with a baseball bat and other weapons and injuring another man, authorities said Sunday.

Chandler police said 50-year-old Derrick Lemond Simmons was booked into a Maricopa County jail Saturday on suspicion of first-degree murder and aggravated assault.

Court documents state that one of the victims was found dead in the Intel Ocotillo Campus cafeteria with blunt-force trauma from a baseball bat along with a hatchet and knife.

Police said the other victim was taken to a hospital with injuries not considered life threatening.

The names and ages of the two men were not immediately available Sunday and police said a possible motive for the attack remained unclear.

It also was unknown if Simmons had a lawyer yet who could speak on his behalf.

Simmons also was convicted in 2001 for aggravated assault with a deadly weapon, according to court paperwork, but details of that case were not immediately available.

Police responded to reports of an assault at the Intel Ocotillo Campus around 6:15 am Saturday.

They said Simmons was located in front of the building carrying two duffle bags.

According to court paperwork, witnesses told police that after the night shift employees left, Simmons approached a man at a table in the cafeteria and allegedly hit him multiple times on the head with a baseball bat for an unknown reason.

The other co-worker sitting at the same table was attacked when he stood up to confront Simmons, police said.

Linda Qian, a spokeswoman for Intel Arizona, said the “tragic incident at the Ocotillo campus” was being investigated by Chandler police and the company’s security staff.