MSNBC is reporting that a freeway bridge over the Mississippi river collapsed around 6PM this evening. One eyewitness is quoted as saying there was "bumper-to-bumper traffic" on the bridge at the time of the collapse.

AP has a report here.

Update: Eyewitness are saying that anywhere from "a dozen to hundreds" of vehicles went into the river.

Update II: MSNBC is reporting that Minneapolis has called "all ambulances in the area to the scene."

Update III: The bridge also had a number of bicyclists and pedestrians on it at the time of the collapse. (This report appears to be inaccurate.)

Update IV: Here is a report from the Minneapolis Star-Tribune.

Update V: The bridge has apparently collapsed on roadways below.

Update VI: More from the Minneapolis Star-Tribune.

Update VII: From WCCO.com.

Update VIII: There is a Minnesota Twins game this evening, and the bridge does lead to the Metrodome.

Update IX: The Minneapolis Star-Tribune has many photos from the scene.

Update X: A longer report from AP.

Update XI: Multiple reports say "at least" 50 cars were on the bridge at the time of the collapse.

Update XII: One report has it that a freight train was passing underneath the bridge at the time of the collapse. Pictures from the Minneapolis Star-Tribune indicate that this report is accurate. The bridge has been undergoing a resurfacing project for the last few weeks.

Update XIII: Terrorism has been ruled out.

Update XIV: Here is CNN's report.

Update XV: Survivors recount close calls, screams - and eerie silence

Update XVI: 'It was the worst thing I've seen in my entire life'

Update XVII: Police: More victims in submerged cars