A man suspected of murdering the family of a baby he then left to die has been captured in Tennessee after a week-long manhunt.

Austin Robert Drummond, 28, was apprehended by US Marshals on Tuesday morning after he was seen in the city of Jackson, where residents had been told by authorities to shelter in their homes.

Footage released by police on Monday showed Drummond wearing a camouflage jacket and holding a rifle, apparently trying to enter a building.

Drummond has been charged with four counts of first-degree murder, aggravated kidnapping, and gun charges in connection with the deaths of Braydon Williams, 15, Matthew Wilson, 21, Adrianna Williams, 20, and Cortney Rose, 38.

The victims were the relatives of a baby whom Drummond allegedly abandoned some 40 miles from their bodies, authorities said.

Police released a photo of the suspect moments after his apprehension, which showed him wearing a black hoodie.