MILWAUKEE — The Sikh temple in Oak Creek is the center of Harpreet Singh’s existence. The cab company owner visits almost every day. And when business takes him to the Milwaukee airport, he stops by to pay his respects.

However, neither Singh nor any of his fellow worshipers have been allowed to return in the five days since a white supremacist burst into the temple and fatally shot six people as Sunday services were to begin. Federal investigators roped off the building as they cataloged the scene and search for clues.