Editor's note: CNN reports, citing law enforcement sources, that New York and New Jersey bombings suspect Ahmad Khan Rahami made several trips to Afghanistan and was questioned when he entered the U.S. However, he was reportedly never on the radar for possible radicalization. Officials have not publicly confirmed this information. Rahami is a U.S. citizen of Afghan descent and has a brother believed to be in Afghanistan, NBC News reports. There is no information indicating connections between his family members and known terrorist groups, NBC adds. - Stephanie
Editor's note: Police have connected Saturday's explosion in Manhattan with the earlier bombing in Seaside Park, N.J. Due to this confirmation, we will now be posting all developments under the topic "Explosions in NJ, NYC, September 2016." Please follow that story for updates moving forward. - Stephanie
Editor's note: If you're just waking up or commuting in the New York City and New Jersey area today, here's the latest: Train service resumed on all Northeast Corridor and North Jersey Coast lines at 5:30 a.m. ET, but residual delays are expected as the investigation in Elizabeth, NJ, continues. Amtrak also says that Acela Express, Northeast Regional and other services will operate Monday with some schedule modifications, so passengers should expect cancellations and delays throughout the day. In Manhattan, West 23rd Street between Sixth and Seventh avenues remains closed as police continue their investigation into Saturday's explosion in Chelsea. PATH trains are skipping 23rd Street in Manhattan, and PATH will cross-honor New Jersey Transit passengers. MTA's 1, E and F trains have resumed normal stops at 23rd and 28th streets. - Rebecca
Editor's note: Officials familiar with the investigation tell NBC News that all devices had old, flip-style cell phone as possible detonators, raising concerns that the New Jersey and Manhattan events could be linked. Those officials also say that at least one surveillance video from 27th Street in Manhattan shows a man leaving a piece of luggage on the sidewalk, and then two other men come and dump the contents of the suitcase and take the empty suitcase. The officials say police are seeking the men, who likely did not know the bag might contain a device, to confirm what they found. - Rebecca
Manhattan (/mænˈhætən/, /mənˈhætən/) is the most densely populated borough of New York City, its economic and administrative center, and the city's historical birthplace. The borough is coterminous with New York County, founded on November 1, 1683, as one of the original counties of the U.S. state of New York. The borough consists mostly of Manhattan Island, bounded by the East, Hudson, and Harlem Rivers, and also includes several small adjacent islands and Marble Hill, a small neighborhood on the U.S. mainland.
Manhattan is often described as the cultural and financial capital of the world and hosts the United Nations Headquarters. Anchored by Wall Street in the Financial District of Lower Manhattan, New York City has been called both the most economically powerful city and the leading financial center of the world, and Manhattan is home to the world's two largest stock exchanges by total market capitalization: the New York Stock Exchange and NASDAQ. Many multinational media conglomerates are based in the borough. It is historically documented to have been purchased by Dutch colonists from Native Americans in 1626, for 60 guilders or about $24 in 1626 and US$1050 today. Manhattan real estate has since become among the most expensive in the world, with the value of Manhattan Island, including real estate, estimated to exceed US$3 trillion in 2013; residential property sale prices in Manhattan typically exceeded US$1,400 per square foot ($15,000/m2) as of 2016.
New York County is the United States' second-smallest county by land area (larger only than Kalawao County, Hawaii), and is also the most densely populated U.S. county. It is also one of the most densely populated areas in the world, with a census-estimated 2015 population of 1,644,518 living in a land area of 22.83 square miles (59.13 km2), or 72,033 residents per square mile (27,812/km2), higher than the density of any individual American city. On business days, the influx of commuters increases that number to over 3.9 million, or more than 170,000 people per square mile (65,600/km2). Manhattan has the third-largest population of New York City's five boroughs, after Brooklyn and Queens, and is the smallest borough in terms of land area.
Many districts and landmarks in Manhattan have become well known, as New York City received a record of nearly 60 million tourists in 2015, and Manhattan hosts three of the world's 10 most-visited tourist attractions in 2013: Times Square, Central Park, and Grand Central Terminal. The borough hosts many world-renowned bridges, such as the Brooklyn Bridge; skyscrapers such as the Empire State Building, one of the tallest skyscrapers in the world; and parks, such as Central Park. There are many historically significant places in Manhattan: Chinatown incorporates the highest concentration of Chinese people in the Western Hemisphere, and the Stonewall Inn in Greenwich Village is considered the birthplace of the modern gay rights movement. The City of New York was founded at the southern tip of Manhattan, and the borough houses New York City Hall, the seat of the City's Government. Numerous colleges and universities are located in Manhattan, including Columbia University, New York University, and Rockefeller University, which have been ranked among the top 35 in the world.