UPDATE: The New York Post, trying to outdo itself apparently, is also reporting that a "Saudi national" is being held in connection with the attacks. One problem: everyone reporting the same thing is quoting the Post, and the one that did a little fact checking on that ended up retracting their statement. The blog PolicyMic issued this correction:
UPDATE: Boston police have stated that no suspect is in custody. The Post's source appears to be inaccurate.
If only the New York Post is reporting something, wait a little while. A number of news sources (some of them with a rightwing lean) reported the Post's report. Odds are that most of them won't retract it.
Amidst the scramble to report on the explosions, which look more and more like a coordinated attack, at the Boston Marathon, the New York Post did what it does best: report the news inaccurately. While, at the time of writing (5:20pm EST), nearly every other news outlet is reporting that the explosions killed two people, the New York Post is running with "12 dead."
It's anyone's guess how the Post found reports of ten more deaths than everyone else, but it is likely a willful reading of eyewitness quotes. People at the scene have used phrases like "dozens of casualties," but in at least some cases, it is clear that the speaker didn't know that casualty means death. For now, it appears that two have died, though that number may increase.