Cops Investigate Tumblr Post Claiming Credit for NYC Blast

The one piece of good news in the wake of Saturday night's explosion in Manhattan is that all 29 people who suffered injuries in the blast are out of the hospital. Beyond that, authorities are still struggling to figure out who planted the device that NYPD chief James O'Neill compared to an IED, or improvised explosive device, near a trash container. So far, there is “no evidence of an international terrorism connection," said Gov. Mario Cuomo, per the Washington Post. He added: “A bomb exploding in New York is obviously an act of terrorism, but it’s not linked to international terrorism. In other words, we find no ISIS connections.” Related coverage:

• Authorities are investigating a now-deleted Tumblr page that claimed responsibility. The author used an image of a rainbow flag and said the bomb was a protest against oppression of the LGBT community, but there is no confirmation it's a legit post. See the New York Daily News.
• DNA Info rounds up what we know and what we don't know about the blast. In the latter category: whether a second device found was actually a bomb or just designed to look that way. Read it here.
• A caller to 911 immediately after the bomb went off warned of more to come, anonymous sources tell the New York Post.
• The explosion came on NYPD chief O'Neill's first full day on the job, and CNN has a profile of him here.
• The New York Times looks at how an ordinary night in Chelsea quickly turned into mayhem in this feature.
• There's still no arrests over the pipe bomb earlier Saturday in New Jersey. Details at NJ.com. In Minnesota, ISIS has claimed responsibility for stabbing of several people at a mall.

(More New York City stories.)