12:03 p.m. Kenyan Geoffrey Mutai has won the Boston Marathon -- and set a new world record at 2:03:01. There was a battle for first place among the women's elite runners, with Kenyan Caroline Kilel narrowly besting American Desiree Davila by three seconds, finishing in 2:22:36.

11:38 a.m. The frontrunners in the men's elite group have reached our spot here near the corner of Commonwealth Avenue and Grant Avenue. A few wheelchairs are still making their way up the hills as well, reaching a wall of applause and cheering as they pass the crowds. 

11:26 a.m. Most of the wheelchairs have reached the last Newton hill and we are starting to see the front of the pack of the elite women runners. 

10:32 a.m. Newton Patch Local Editor Melanie Graham has set up at the corner of Commonwealth Avenue and Grant Avenue in the Newton hills. About a dozen of the men's wheelchair participants have passed through as well as some of the ladies' wheelchair leaders. 

Many patrons have started to set up chairs on the side of Commonwealth Avenue to cheer on those in the race. A large group of Boston College students are also lining the side of the road.

The 2011 Boston Marathon got underway at 9:17 a.m. when the first wheelchair racers crossed the start line in Hopkinton. The elite men and women start at 9:32 and 10 a.m., followed by three waves of qualified and charity runners.

Check Brookline Patch throughout the day for coverage of the marathon, including updates on local runners.