Milwaukee ? Quadrevion “Dre” Henning and Purvis Virginia Parker had spent most of Sunday morning playing outside, but they weren’t ready to kick back and watch TV.

So, a few hours before dark, they got permission from home to head for a northwest Milwaukee playground less than two blocks from their homes.

Their families haven’t seen them since.

“It’s like the children dissolved,” Trevor Henning, Dre’s uncle, said Thursday. “They just disappeared.”

Despite four days of searching the area with dogs, divers and 150 volunteers, police say they have no idea what happened to Dre, 12, or Purvis, 11.

Without anything to go on, police are not calling the disappearance an abduction.

“We’re just mystified,” said spokeswoman Anne Schwartz, who noted that it is unusual for two unrelated boys to go missing together.

“Typically that’s not a situation you would see in the case of a child abduction,” Schwartz said.

Dre and Purvis live just around the corner from each other in a neighborhood of mostly single-story, well-kept frame homes.

Neighbors and friends of two missing boys, Quadrevion Dre Henning, 12, and Purvis Virginia Parker, 11, take part in a vigil in front of Dre's home Thursday in Milwaukee. Bloodhounds scrambled through the neighborhood where the two young boys remained missing for a fifth day Thursday while police expanded their search perimeter and fielded hundreds of calls about the boys' disappearance.

Dre and a cousin, also 11, live with their grandparents, while Purvis lives with his mother, stepfather and three sisters. Neither is the type to go play without telling anyone, much less run away, relatives said.

Dre is a sixth-grader at LaBrew Trooper Military University in Milwaukee.

Purvis and is a fifth-grader at Elm Creative Arts School, a public school that emphasizes art, music and dance.

On Sunday morning, the boys had been out playing with Dre’s cousin. Later they helped their grandmother unload groceries, and sometime after 3 p.m., Dre and Purvis headed for the park without Dre’s cousin, who wanted to watch TV instead.

When they did not return, the families called police about 8:30 that night, Schwartz said.

It’s not clear whether they ever made it to the playground at Hampton School. Police have not found anyone who could say one way or another, Schwartz said.

On Thursday, police expanded their search across the city as purported sightings poured in. Police and volunteers combed a nearby park and a larger forest preserve, but turned up nothing.