An early morning fire at a Middlesex County apartment complex sent two young children to the hospital, neighbors told News 12.

A police investigation is underway following the incident at Glenwood Apartments in Old Bridge.

Neighbors say they called police and fire departments and watched as two children – a 3-year-old and a 6-year-old – were pulled out of the apartment and taken away in an ambulance.

A neighbor says smoke was billowing through the front door of the affected apartment.

Police have not yet commented on the incident.