UPDATE (3:31 p.m.): Valencia Boulevard and Magic Mountain Parkway is open to drivers. Toppers Pizza remains closed Sunday afternoon. Previously published (1:00 p.m.) :A series of underground vault explosions outside Toppers Pizza in Valencia prompted an evacuation and closed the busy intersection of Valencia Boulevard and Magic Mountain Parkway Sunday. The first reported explosion occurred around 12:06 p.m. near Toppers ...

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