A number of suspicious packages have been found since the bombings last weekend in Manhattan and New Jersey, including three more found Wednesday in New York City and Long Island.

On Saturday, an explosive device that went off on 23rd Street in Manhattan's Chelsea neighborhood left 31 people injured. Court documents released Tuesday gave some details of the scene, including a man who was knocked unconscious by the blast while driving. A woman was hospitalized and had to have multiple ball bearings removed from her body.

Suspect Ahmad Khan Rahami has been charged with conducting and attempting to conduct bombings in New York City and various locations in New Jersey.

Former Homeland Security advisor Michael Balboni says it's not uncommon that several false alarms are now being reported. The NYPD on Wednesday gave the all-clear on items found in the SoHo neighborhood in Manhattan and the Mott Haven section of the Bronx.

On Long Island, North Shore High School in Glen Head was evacuated Wednesday morning. It happened after a discarded pressure cooker was found by a staff member who called police. The cooker was found outside by the cafeteria and was moved to another location on top of a recycling pile. It was discovered in that case that a science teacher threw out the pressure cooker.

A former Suffolk police chief stressed that people should always call police if they see something suspicious. He says it is never a waste of time.