3:05 p.m. -- A driver in a rented truck jumped onto a bike path along the West Side Highway, a few blocks away from One World Trade Center. He drove for about 10 blocks before colliding with a school bus at Houston Street. A police officer is being credited with stopping the driver, who got out of his vehicle after hitting the school bus.
4:34 p.m. -- New York Sen. Chuck Schumer thanked New York police for their rapid response.
4:37 p.m. -- In an update to the press, White House Press Secretary Sarah Sanders said that President Donald Trump had been briefed on the situation by White House Chief of Staff John Kelly.
4:46 p.m. -- A source confirmed to ABC News that the incident was being investigated as possible terrorist attack.
4:50 p.m. -- ABC News reported that Attorney General Jeff Sessions and Christopher A. Wray were being briefed.
4:57 p.m. -- First lady Melania Trump tweeted about the incident.
5:23 p.m. -- New York City Mayor Bill de Blasio called the attack an act of terror. Eight people are reported dead -- six were killed at the scene and two more died later at area hospitals.
5:27 p.m. -- New York Gov. Andrew Cuomo said during a press briefing that there is no evidence of a wider threat.
5:30 p.m. -- Trump tweets, "...looks like another attack by a very sick and deranged person."
5:34 p.m. -- The suspect is identified as 29-year-old Sayfullo Saipov from Tampa, Florida.
5:35 p.m. -- Vice President Mike Pence offers his prayers for the victims, families and first responders.
6:57 p.m. -- Trump expresses his condolences for the victims and their families.
7 p.m. -- In a display of strength and solidarity, de Blasio and Cuomo march as a part of the New York City Village Halloween Parade.
8:31 p.m. -- ABC News reports that truck attack suspect Sayfullo Saipov left a note saying he had done the attack on behalf of ISIS.
**All times listed in Eastern Standard Time