Update: 6 From Coronado at Boston Marathon Where Explosions Killed 3

Update 6:05 p.m.: With new casualty count and the possible status of another Coronado runner.

Six runners from Coronado took part in the Boston Marathon Monday, with four finishing before explosions at a nearby hotel reportedly claimed the lives of three people and injured more than 100 near the finish line.

According to the Boston Athletic Association site, four entrants from Coronado had finished before the blasts, which were caught live on some video feeds and by the Boston Globe.

The Coronadans who finished are:

• Shelby Hartmann, age 39, 3 hours, 19 minutes, 57 seconds
• Thomas Hartmann, 53, 3:27:40
• Scott Tetzlaff, 42, 4:24:25.
• Marty Timmons, 33, 3:12:24.

These marks are “gun times,” but not the actual times from start to finish, since many thousands of entrants don’t reach the starting line until minutes after the gun goes off.

As of 3:35 p.m. Pacific time, two Coronadans had no recorded finishing times, which could mean they were back in the pack or diverted away from the bomb scene.

They are:

• Margaret Everett, 44, who reached the halfway point at 2:12:09
• Nicola McMahon, 56, whose halfway time was 2:00:32.

A reader noted in the comments below that McMahon confirmed she was unable to finish, but is safe. Coronado High School water polo coach Randall Burgess also said McMahon was okay, and was coming in for a time of about 4:20.

The bombs went off 10 minutes ahead of her projected arrival, he estimated.

Tetzlaff, according to an online tool created by Google, was accounted for as well.

Burgess also noted that a 1981 CHS grad, Lee Ann Yarbor, finished ahead of the explosions.

Google's tool is to help locate loved ones or offer information if you have received word on a loved one's status. You can find it here, to search for those affected or offer a report on someone's condition.

Boston Backbay Patch is covering the ongoing story. CNN reports that one hospital has taken in 19 patients from the incident, six of whom are in critical condition.

Jim Goss of La Mesa finished the marathon less than an hour before twin explosions rocked the finish line area.

Goss, 45, posted on Facebook: “Pandemonium near the finish line of the Boston Marathon. I'm OK and I think all of our group is OK too. There is limited cell service and my phone is charging. My thoughts are with the families of those killed and injured.”

Kate Garcia of the San Diego Track Club sent this message to members via email:

As I’m sure you all know by now, there were two bombs that exploded at the Boston Marathon finish line today.  We have unofficially heard that all of our SDTC runners are safe.  We know that all but two finished the race and the two who didn't weren't near the end when the race was halted.  We will send more information as we get personal confirmation from our SDTC runners.  Please join us today as we keep those affected by this tragedy in our thoughts and prayers.

Garcia, president of the club, said about 20 members took part at Boston.

“I was shocked,” she said of her first reaction. “Then there was a mad scramble to get information” about the runners’ well-being.

She said she sent out many texts to members and then “I finally got word (that all of the club’s athletes were safe) and it was such a relief.”

“I cried,” Garcia said, “but now the anger has set in. This is never going to make sense.

“This is not a political event. They are the best athletes in the world. Why would they be a target? It just doesn’t make sense.”

Nearly 2,000 participants in the marathon are from California and about 200 of those are from San Diego County, according to race records.

Response to the tragedy was swift and sorrowful. Coronado's Congressional representative, Scott Peters, tweeted: “My thoughts and prayers are with those affected by the horrible explosions today in Boston.”

Patch will provide updates on this developing story.