Pa. manhunt underway after 6 shot dead

Bradley William Stone, is shown in an undated file photo.

Police search Pennsburg, Pa. search for suspect Bradley William Stone.

A Pennsburg, Pa. resident watches police search for Bradley William Stone.

Police search Pennsburg, Pa. for Stone.

Police walk along a Pennsburg, Pa. street during the search.

Police cross a street during the search for Bradley William Stone in Pennsburg.

Police a Pennsburg, Pa. neighborhood for suspect Stone.

Police gather at a staging area as they search for suspect Bradley William Stone, Dec. 16, in Pennsburg, Pa. Stone is suspected of killing his ex-wife and five of her relatives, amid a child custody dispute.

Police gather at a staging area as they search for suspect Bradley William Stone, Dec. 16, in Pennsburg, Pa. The search has spread to two suburban Philadelphia counties.

A sheriff's deputy stands outside a Pennsburg, Pa. home on Dec. 16, 2014, where suspect Bradley William Stone was sought after the night before.

Police gather near a home in Pennsburg, Pa., where suspect Bradley William Stone is believed to have barricaded himself inside after shootings at multiple homes. Authorities say Stone killed six people and seriously wounded another in three different homes outside Philadelphia and remains at large hours after the shootings.

A photograph provided by the Montgomery County Office of the District Attorney in Norristown, Pa., shows Bradley William Stone, 35, of Pennsburg, Pa., a suspect in six shooting deaths in Montgomery County District Attorney Risa Vetri Ferman said all of the victims have a "familial relationship" to Stone.

Police gather near a home,in Pennsburg, Pa., where suspect Bradley William Stone is believed to have barricaded himself inside.

Police gather near a home in Pennsburg, Pa., where suspect Bradley William Stone is believed to have barricaded himself inside.

Residents gather on West 5th Street in Lansdale, Pa. while police investigate a shooting in Souderton, Pa., outside Philadelphia.

A SWAT team gathers near the scene of a shooting in Souderton, Pa., outside Philadelphia.

Police gather near a home in Pennsburg, Pa., where suspect Bradley William Stone is believed to have barricaded himself inside.

Police gather near a home in Pennsburg, Pa., where suspect Bradley William Stone is believed to have barricaded himself inside.

Police move near the scene of a shooting at a home in Souderton, Pa.

Police SWAT team officers provide cover as a listening device is placed on the porch where police believe a gunman accused in the shooting deaths of six people is hiding in his home in Pennsburg, Pa.

A police officer moves near a home in Souderton, Pa.,where a suspect is believed to have barricaded himself inside.

A police officer moves near a home in Souderton, Pa., where a suspect is believed to have barricaded himself inside.