More to follow…

BOSTON (AP) — Two explosions at the finish line of the Boston Marathon have resulted in injuries.

Bloody spectators were being carried Monday to the medical tent that had been set up to care for fatigued runners. Police wove through competitors as they ran back toward the course.

There are a lot of people down,” said one man, whose bib No. 17528 identified him as Frank Deruyter of North Carolina. He was not injured, but marathon workers were carrying one woman, who did not appear to be a runner, to the medical area as blood gushed from her leg. A Boston police officer was wheeled from the course with a leg injury that was bleeding.

About three hours after the winners crossed the line, there was a loud explosion on the north side of Boylston Street, just before the photo bridge that marks the finish line. Another explosion could be heard a few seconds later.

Update: Video of the first explosion.

Update: The windows of the Starbucks across from the finish line blown out.

Update: You can see the smoke from the first explosion and what appears to be the fireball from the second (click here larger image).

Update: Close up of the explosion.

Update: Police responding to report of another bomb.

Update: From local reporter Jackie Bruno, “I saw people’s legs blown off.”

Update: According to Fox News, at least three people are dead.

Update: Per the Daily Mail.

Three people have been reported dead and up to 60 people have been injured after two large explosions went off near the finish line of the famous Boston Marathon today, leaving behind a scene of unimaginable carnage.

Eyewitnesses at the scene said there were two loud explosions about five seconds apart, and emergency vehicles crowded the scene. Up to 60 people have been reported injured, dozens of them seriously.

Witness Dave Weigel said via Twitter minutes after the explosion: ‘I saw people’s legs blown off. Horrific. Two explosions. Runners were coming in and saw unspeakable horror.’

Update: At least 10 people are being treated for amputations.

Update: Seriously fucked up.

BOSTON — Two explosions shattered the euphoria of the Boston Marathon finish line on Monday, sending authorities out on the course to carry off the injured while the stragglers in the 26.2-mile trek from Hopkinton were rerouted away from the smoking site of the blasts.

A federal law-enforcement source told The Post there are at least 12 dead and twice as many injured. Fox News reported that Massachusetts General Hospital was treating 10 people with amputated limbs and all operating rooms were on hold.

Law-enforcement sources said at least the first explosion occurred in the lobby of the Fairmont Hotel.

“There were two bombs that exploded near the finish line in today’s Boston Marathon,” The Boston Marathon’s official Facebook page read. “We are working with law enforcement to understand what exactly has happened.”

Update: Esquire magazine is already blaming conservatives.

Update: Unreal.

Update: All the hallmarks of al-Qaeda.

Update: Two more bombs were found on scene and are being dismantled.

(TPM) — Intelligence officials say that two more explosive devices were found on the scene of the Boston marathon on Monday and are currently being dismantled, according to the Associated Press. Two explosions rocked the finish line earlier in the day, leaving two dead and 22 injured.

Update: Here in Mass today is Patriot’s Day, which is really just an excuse to give public sector unions the day off to watch the marathon, nobody else gets the day off and the “holiday” is almost never mentioned. Still, Wolf thinks this could be the reason for the attack (vid ht Matt Wolking).

Update: Why would someone with an ax to grind with the government bomb the Boston Marathon when there are dozens of federal government buildings in Boston? Makes no sense, but hey, why let the stop them from trying to smear the right.

Update: The JFK Library is one of the most popular tourist attractions in the city.

(TPM) — The Boston Police Department has confirmed to TPM that an explosive device went off at the John F. Kennedy Presidential Library and Museum in Boston, Mass. on Monday. No injuries occurred in the incident.

“There was another device, confirmed at JFK,” Neva Coakley, an officer in the Boston Police Department’s press office, told TPM.

Update: Pic of JFK Library.