Disgruntled Texan supermarket employee shoots his manager dead then turns the gun on himself

A disgruntled worker at a supermarket in Texas shot his manager dead then killed himself as well.

The unnamed man, said to be in his 40s, was working a shift at the Hong Kong Food Market, an Asian grocery store, when he turned on his boss this Monday.

The killer struck around 1pm, witnesses say, when the supermarket was heaving with shoppers.

He is said to have gone into a bathroom in an employee-only sections of the store, and emerged moments later with a powerful .50-cal handgun.

He walked up to his manager, a man in his 60s, and shot him dead, according to ABC133 Houston.

The man then reportedly walked away from the dead body and shot himself as well. Both men were declared dead by the time police and paramedics arrived.

According to the Houston Chronicle, police said there was 'no motive' for the gun attack.

Shoppers were evacuated from the out-of-town mall complex in which the supermarket is located.

Many of them said they heard shots fired inside the store, but did not see the shooting because it happened in an employee-only part of the complex.

Pictured is a loading bay just outside of where the shooting took place, in a back room of the store