Update:  The freeway is reopened. The device found was a pipe sealed at both ends containing inert military ordnance, NBC news reports. It is unknown how the object wound up in this location.

May 2, 2011 (San Diego) 9:30 a.m. - A possible pipe bomb has forced closure of I-5 southbound at the Coronado Bridge, Incident Page Network reports.  San Diego Police, San Diego Fire Department and the Bomb/Arson squad has been summoned.  A SIG Alert has been issued and all traffic is being diverted, San Diego SIG alerts confirms.