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An armed man stole an unknown amount of money and a guard’s firearm during the robbery of an armored truck in Granada Hills on Tuesday, prompting investigations by the FBI and LAPD.

A Brink's truck remains at the scene where its guard was robbed at a Granada Hills strip mall on March 29, 2016. (Credit: KTLA)
A Brink’s truck remains at the scene where its guard was robbed at a Granada Hills strip mall on March 29, 2016. (Credit: KTLA)

The call came from Chatsworth Street and Zelzah Avenue about 11:10 a.m., according to Los Angeles Police Department spokesman Officer Matthew Ludwig.

The robber approached a Brink’s truck and demanded cash from the driver while the vehicle was in front a CVS/pharmacy, a police detective on scene said. He got away with one bag of money and demanded the truck’s armed guard hand over his weapon, which the guard did.

The truck tried to chase the suspect, but he got away, the detective said.

The robbery was jointly being investigated by the FBI and LAPD’s Robbery-Homicide Division, FBI Los Angeles office spokeswoman Laura Eimiller said.

The robbery had not yet been linked to any other similar crime, she said.

A man in a gray hooded sweatshirt, armed with a handgun, fled on foot after the robbery, Ludwig said.

The location of the robbery, which occurred in a strip mall, is in a busy commercial area.

KTLA’s Jennifer Thang contributed to this article.