The police in the US city of Orlando say they have arrested a gunman who opened fire in an office building, killing one person and injuring five others.

Jason Rodriguez, a 40-year-old man who once worked in the building, reportedly surrendered to police at his mother's house.

The attack took place at the offices of an engineering firm at the Gateway Center building about 11:30 this morning.

It comes one day after a gunman killed 13 people at an army base in Texas.