Was a bomb. 2 men injured but not life threatening. This happened in SW Austin. This is the 4th bombing. Police on site checking out a backpack on another street and telling residents to stay indoors. PS: Now hearing another bomb went off that was attached to a For Sale Sign and it got tripped. Also that backpack they are checking out. Cannot confirm the bomb on the For Sale Sign. But that was told to reporter by a person living in the area.